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PLEASE HURRYIn the diagram of circle O, what is the measure of ∠ABC?I WILL GIVE BRAINLIEST

Mathematics 24/02/2020 12:17 PM answersmine

Answer:

The measure of angle ABC is 34°

Step-by-step explanation:

we know that

The measurement of the outer angle is the semi-difference of the arcs it encompasses.

so

∠ABC=(1/2)[major arc AC-minor arc AC]

∠ABC=(1/2)[major arc AC-146°]

Find the measure of major arc AC

major arc AC=360°-146°=214°

substitute

∠ABC=(1/2)[214°-146°]=34°

The left side of the heart receives blood from veins, transfers it to the chambers on the right side of the heart, which circulates it back through the blood vessels. True or False

Biology 24/02/2020 08:37 AM answersmine

Answer:

False

Explanation:

There are a number of veins and arteries attaching to the heart. The superior and inferior vena connect to the right atrium, while the pulmonary veins connect to the left atrium. The pulmonary artery connects the right ventricle to the lungs, while the aorta connects the left ventricle to the body.

In the equation x=y^3 - 10, is y a function of x?

Mathematics 24/02/2020 08:12 AM answersmine

Answer:

No

Step-by-step explanation:

If y is a function of x, then the equation would be written as a "y =" equation, not an "x = " equation.  This example is one where x is a function of y.

What is the value of x?OO12 units15 units20 units24 units​

Mathematics 24/02/2020 07:45 AM answersmine

Answer:

15 units

Step-by-step explanation:

similar triangles

9/x = x/25

 {x}^{2}  = 225

x = 15

In what ways are humans like the other primates? In what ways are we unique?

Biology 24/02/2020 06:17 AM answersmine

Answer:

In what ways are humans like the other primates?

Primates and humans have taking hands and feet that let them hang from branches, grab food, and, in some primates, use tools. The first digit in many primates and humans are opposable and at least some, if not all, of the digits, have nails.

Unlike the eyes of shrews and squirrels, which sit on each side of the head so that the two fields of vision do not overlap, the eyes of primates and humans are shifted forward to the front of the face. This produces an overlapping binocular vision that lets the brain judge distance precisely—important to an animal moving through the trees.

In what ways are we unique?

The first hominids were australopithecines. The ability to walk upright on two legs marks the beginning of hominid evolution. Humans diverge from apes in numerous areas of anatomy related to bipedal locomotion. Because humans walk on two legs, their vertebral column is more curved than an ape’s, and the human spinal cord exits from the bottom rather than the back of the skull. The human pelvis has become broader and more bowl-shaped, with the bones curving forward to center the weight of the body over the legs.

Quadrilateral EFGH was dilated by a scale factor of 2 from the center (1, 0) to create E'F'G'H'. Which characteristic of dilations compares segment E'F' to segment EF? A segment that passes through the center of dilation in the pre-image continues to pass through the center of dilation in the image. A segment in the image has the same length as its corresponding segment in the pre-image. A segment that passes through the center of dilation in the pre-image does not pass through the center of dilation in the image. A segment in the image is proportionally longer or shorter than its corresponding segment in the pre-image.

Mathematics 24/02/2020 06:17 AM answersmine

Answer: A segment in the image is proportionally longer or shorter than its corresponding segment in the pre-image.

Step-by-step explanation:

  • A dilation is a transformation that maps an image that is the similar to the actual shape .

i.e. It creates images of same shape but of different size.

A dilation stretches or shrinks a shape by using the scale factor and about the fixed center of the dilation.

Given : Quadrilateral EFGH was dilated by a scale factor of 2 from the center (1, 0) to create E'F'G'H'.

Then Quadrilateral EFGH must be similar to E'F'G'H'.

It means sides of Quadrilateral EFGH must be proportional to sides of Quadrilateral E'F'G'H'.

Hence, the correct characteristic of dilation compares segment E'F' to segment EF is :

A segment in the image is proportionally longer or shorter than its corresponding segment in the pre-image.

Using the linear combaination method what is the solution to the system of linear equations 7x-2y=-20and9x+4y=-6

Mathematics 24/02/2020 06:17 AM answersmine

Answer:

x=-2  y=3

Step-by-step explanation:

7x-2y=-20

9x+4y=-6

Multiply the first equation by 2

2(7x-2y) = 2 * -20

14x - 4y = -20

Add this to the second equation

14x - 4y = -40

9x+4y=-6

--------------------------

23x = -46

Divide by 23

23x/23 = -46/23

x = -2

Now we solve for y

9x+4y=-6

9(-2) +4y = -6

-18 + 4y = -6

Add 18 to each side

-18+18 +4y = -6+18

4y = 12

Divide by 4

4y/4 = 12/4

y=3

An iron container has a mass of 200 g and contains 50 g of water @ 40°C. 50 g of ice @ -6°C are poured. Calculate the equilibrium temperature and describe the final composition.

Physics 24/02/2020 06:15 AM answersmine

Answer:

final equilibrium temperature of the system is ZERO degree Celcius

Explanation:

Hear heat given by water + iron = heat absorbed by ice

so here first we will calculate the heat given by water + iron

Q_1 = m_1s_2\Delta T_1 + m_2 s_2 \Delta T_1

Q_1 = (200)(0.450)(40 - T) + (50)(4.186)(40 - T)

now the heat absorbed by ice so that it will melt and come to the final temperature

Q_2 = m s \Delta T + mL + m s_{water}\Delta T'

Q_2 = 50(2.09)(0 + 6) + 50(335) + 50(4.186)(T - 0)

now we will have

17377 + 209.3T = 3600 - 90T + 8372 - 209.3T

17377 + 209.3T + 90T + 209.3T = 11972

T = -10.6

since it is coming out negative which is not possible so here the ice will not completely melt

so final equilibrium temperature of the system is ZERO degree Celcius

How much work in joules must be done to stop a 920-kg car traveling at 90 km/h?

Physics 24/02/2020 06:15 AM answersmine

Answer:

Work done, W = −287500 Joules

Explanation:

It is given that,

Mass of the car, m = 920 kg

The car is travelling at a speed of, u = 90 km/h = 25 m/s

We need to find the amount of work must be done to stop this car. The final velocity of the car, v = 0

Work done is also defined as the change in kinetic energy of an object i.e.

W=\Delta K

W=\dfrac{1}{2}m(v^2-u^2)

W=\dfrac{1}{2}\times 920\ kg(0-(25\ m/s)^2)

W = −287500 Joules

Negative sign shows the work done is done is opposite direction.

Mathematically define heat capacity with equations.

Chemistry 24/02/2020 06:15 AM answersmine

Answer:    The amount of energy needed to heat the body by 1 ° C (Q)

Explanation:  The heat capacity or as it is called the thermal mass is the amount of energy needed to heat the body by 1 ° C. When the body is said, it refers to any object in any aggregate state. The energy required for the body to warm up by 1 ° C is expressed in joules, and is obtained when the specific heat of the body multiplies with the body mass and with the change of temperature:

Q = m·c·ΔT

Q - heat capacity (J),

m - mass of the body (g),

c - specific heat of the body (J/g-°C),

ΔT - change in temperature (°C)

A bolt comes loose from underneath an elevator that is moving upward at a speed of 5 m/s. The bolt reaches the bottom of the elevator shaft in 3.1 s. (a) How high up was the elevator when the bolt came loose? (In m) (b) What is the speed of the bolt when it hits the bottom of the shaft? (In m/s)

Physics 24/02/2020 06:13 AM answersmine

Answer:

a)  The elevator was  31.64 m high up when the bolt came loose.

b)  Speed of the bolt when it hits the bottom of the shaft = 25.41 m/s

Explanation:

a) Considering motion of bolt:-

Initial velocity, u =  5 m/s

Acceleration , a = -9.81 m/s²

Time = 3.1 s

We have equation of motion s= ut + 0.5 at²

Substituting

   s= 5 x 3.1 - 0.5 x 9.81 x 3.1²

    s = 0 x t + 0.5 x 9.81 x t²

    s = -31.64 m

The elevator was  31.64 m high up when the bolt came loose.

b) We have equation of motion v = u + at

  Initial velocity, u =  5 m/s

 Acceleration , a = -9.81 m/s²

 Time = 3.1 s  

Substituting

  v = u + at

  v  = 5 - 9.81 x 3.1 = -25.41 m/s

Speed of the bolt when it hits the bottom of the shaft = 25.41 m/s

A uniform plank is 8-m long and weighs 99 N. It is balanced on a sawhorse at its center. An additional 182 N weight is now placed on the left end of the plank. To keep the plank balanced, it must be moved what distance (in m) to the right? Round your answer to the nearest tenth.

Physics 24/02/2020 06:12 AM answersmine

Answer:

It must be moved by 2.59 m to the right

Explanation:

To keep the plank in uniform state, the moment at sawhorse = 0

Let y be the distance of saw horse from left of plank.

Weight per unit length of plank =\frac{99}{8}=12.375N/m

Taking moment about saw horse

Moment due to left portion,

         182 x y + 12.375 x y x 0.5 y = 182 y + 6.1875 y²

Moment due to right portion,

         12.375 x (8-y) x 0.5 (8-y) = 396 + 6.1875 y² - 99y

So to keep balance these moments should be same

         182 y + 6.1875 y² = 396 + 6.1875 y² - 99y

         281 y = 396

                y = 1.41 m

Distance moved to right = 0.5 x 8 - 1.41 = 2.59 m

So it must be moved by 2.59 m to the right

A +3.00); C charge with a mass of 4.00 x 10-3 kg hovers above a horizontal flat insulating surface, neither descending nor ascending, and thus in mechanical equilibrium. Taking g = 9.8 m/s2, what is the magnitude of the electric force on the charge? Hint: keep in mind that the weight force is given by F mg ? A. 0.0281 N O B. 0.0392 N C. 0.0473 N 0 D. 0.0671 N

Physics 24/02/2020 06:10 AM answersmine

Answer:

option (B)

Explanation:

q = 3 c, m = 4 x 10^-3 kg, g  9.8 m/s^2,

In the equilibrium condition, the weight of the charge particle is balanced by the electrostatic force.

q E = mg

Electrostatic force = m g = 4 x 10^-3 x 9.8 = 0.0392 N

The speedometer of a European sportscar gives its speed in km/h. To the nearest integer, what is the car's speed in mi/h when the speedometer reads 282 km/h?

Physics 24/02/2020 06:10 AM answersmine

Answer:

175  \frac{mi}{h}

Explanation:

v = speedometer reading of a european sportscar = 282 \frac{km}{h}

we know that,

1 km = 0.621 miles

So the speedometer reading of a european sportscar in  mi/h is given as

v = 282 \frac{km}{h} = 282\left ( \frac{km}{h} \right ) \left ( \frac{0.621 mi}{1 km} \right )

v = (282 x 0.621) \frac{mi}{h}

v = 175  \frac{mi}{h}

A ________ is a risk associated with exercising on hard surfaces, which causes pain in the front of the lower leg

Health 24/02/2020 06:08 AM answersmine

Answer:

A shin splint is a risk associated with exercising on hard surfaces, which causes pain in the front of the lower leg.

1) Emily wants to create snack bags for a trip she is going on. She has 6 granola bars and 10 pieces of dried fruit. If the snack bags should be identical without any food left over, what is the greatest number of snack bags Emily can make? Write answer in sentence form.

Mathematics 24/02/2020 06:03 AM answersmine

Answer: 2

Step-by-step explanation:

Given : The number of granola bars = 6

The number of pieces of dried fruit = 10

If the snack bags should be identical without any food left over, then the greatest number of snack bags Emily can make is the greatest common factor (GCF) of 6 and 10.

Since , factors of 6 = 1, 2, 3, 6

Factors of 10 = 1, 2, 5, 10

Hence, the greatest common factor of 6 and 10 = 2

Thus, the greatest number of snack bags Emily can make = 2.

Richard wants to buy a LCD flat panel monitor measuring 14 inches by 16 inches. What is the measure of the diagonal of the monitor? (JUSTIFY)

Mathematics 24/02/2020 06:00 AM answersmine

Answer:

21.26 inches.

Step-by-step explanation:

It can be inferred that the shape of the monitor is a rectangle, in which the length of the monitor is 16 inches and the height of the monitor is 14 inches. The diagonals of the rectangle cut it into two congruent right-angled triangles. Therefore, to find the length of the diagonal of the monitor, use the Pythagoras Theorem. Since the base (b) is 16 inches and the perpendicular (p) is 14 inches, the distance of the hypotenuse (i.e. the diagonal, denoted by h) can be found by the following formula:

h^2 = b^2 + p^2

Plugging in the values:

h^2 = 16^2 + 14^2

Simplifying gives:

h^2 = 452

Taking square root on both sides gives:

h = 21.26 inches (to the nearest 2 decimal places)

Therefore, the measure of the diagonal is 21.26 inches!!!

Histamine is a substance that is released by cells in response to injury, infections, stings and materials that cause allergic responses, such as pollen. Histamine causes dilation of blood vessels and swelling due to accumulation of fluid in the tissues. People sometimes take antihistamine drugs to counteract the effects of histamine. A sample of histamine having a mass of 385 mg is composed of 208 mg of carbon, 31 mg of hydrogen and 146 mg of nitrogen. The molar mass of histamine is 111 g/mol. What is the molecular formula for histamine?

Chemistry 24/02/2020 05:45 AM answersmine

Answer:

  • C₅H₉N₃

Explanation:

First, you need to find the empirical formula of the compound (histamine).

To find the empirical formula convert all the data given in mass units (miligrams) into mole numbers.

You do that by using the formula: number of moles = mass in grams / atomic mass.

To find the mass in grams divide the mass in miligrams by 1,000.

Build a table:

Element    mass (g)   atomic mass (g/mol)    number of moles (mol)

C                0.208           12.011                        0.0173

H                0.031            1.008                        0.0307

N                0.146           14.007                       0.0104

Now, find the ratio C:H:N, for which you divide every number of moles by the smallest number of moles: 0.0104:

  • C: 0.0173 / 0.0104 = 1.665
  • H: 0.0307 / 0.0104 = 2.957
  • N: 0.0104 / 0.104 = 1.002

You must find a multiple that yields 1.665 to a reasonably close integer.

Muliply every amount by 3:

  • C: 1.665(3) = 4.995 ≈ 5
  • H: 2.957(3) = 8.871 ≈ 9
  • N: 1.002(3) = 3.007 ≈ 3

Hence, the empirical formula is C₅H₉N₃.

Now, find the mass of the empirical formula:

  • 5(12.011 g/mol) +  9(1.008 g/mol) + 3(14.007 g/mol) = 111.148 g/mol ≈ 111 g/mol.

Since the mass of the empirical formula is the same of the molecular formula, both formulae are the same.

Therefore, the answer is: C₅H₉N₃ ← molecular formula

A coral reef is an underwater structure that is home to many sea animals that use the water as a resource. Some animals are called stony corals because they have hard bodies that resemble rocks; these provide protection to other animals that live on the reef.

English 24/02/2020 05:43 AM answersmine

Answer:

Answer: ecosystem

Explanation:

An ecosystem is a community of living and non-living components. A coral reef is an aquatic ecosystem which is formed by a continuous walls of calcium carbonates released by living animals they get combine to form rocks. These rocks and walls are collectively called as hard stony corals. These hard stony corals provide shelter to many aquatic animals like fishes. As the water is the chief abiotic factor along with coral walls and rocks which help in the survival of living organisms therefore, ecosystem is the largest organizational level found in one coral reef.

Hope This Helps!

All but 1/13 of the students enrolled at a particular elementary school participated in "Family Fun Night" activities. If a total of 396 students were involved in the evening's activities, how many students attend the school?

Mathematics 24/02/2020 05:43 AM answersmine

Answer:429

Step-by-step explanation: let the total number of students in the elementary school be X

X - X/13 = 396

12X/13=396

X=396/*13/12

X=5148/12

X=429

Correct the subject-verb agreement errors in the following paragraph by marking out the incorrect verb and writing the correct one above it. Keep all verbs that you change in present tense. There is only one subject-verb agreement error in each of the incorrect sentences. Some of the sentences already contain correct subject-verb agreement and thus do not need to be changed. 1.Millions of tons of trash floats in our oceans. 2. There is all kinds of items, including fishing nets and bottles. 3. Currents in the oceans carries this debris so that it collects in big areas known as garbage patches. 4. These areas of garbage has been increasing in size since plastic first became commonly used sixty years ago. 5. Anything made of plastic is very durable and buoyant, so it will float in the ocean for many years. 6. Why is garbage patches such a problem? 7. For one reason, birds, as well as fish, mistakes the plastic for food and die after trying to eat it. 8. In addition, if people eat these fish, then they are risking their health. 9. Until everyone stops creating so much trash, there are not a solution to this problem

English 24/02/2020 05:38 AM answersmine

Answer:

1.Million of tons of trash floats in our oceans.

2. There ARE all kinds of items, including fishing nets and bottles.

3. Currents in the oceans CARRY this debris so that it collects in big areas known as garbage patches.

4. These areas of garbage HAVE  been increasing in size since plastic first became commonly used sixty years ago.

5. Anything made  of plastic is very durable and buoyant, so it will float in the oceanS for many years.

6. Why ARE garbage patches such a problem?

7. For one reason, birds, as well as fish,MISUNDERSTAND  the plastic for food and die after trying to eat it.

8. In addition, if people eat these fishES, then they are risking their health. 9. Until everyone stops creating so much trash, there IS not a solution to this problem

The question asks, "Find the equation of the ellipse with the following properties. The ellipse with x-intercepts (5, 0) and (-5, 0); y-intercepts (0, 3) and (0, -3)." I know that the equation for an ellipse is x^2/a^2+ y^2/b^2=1 but I have no idea how to create the equation given x-intercepts and y-intercepts. Please help! Thank you.

Mathematics 24/02/2020 05:38 AM answersmine

Answer:

\frac{x^2}{25}+\frac{y^2}{9}=1

Step-by-step explanation:

Equation of ellipse is of form \frac{x^2}{a^2}+\frac{y^2}{b^2}=1 where (a,0) , (-a,0) are the x-intercepts and (0,b) , (0,-b) are the y-intercepts . If a > b then it is a horizontal ellipse and if a < b then it is a vertical ellipse .

For horizontal axis ,

Here, (a,0) , (-a,0) are known as the vertices of ellipse and (0,b) , (0,-b) are the co-vertices of ellipse .

Horizontal axis is known as the major axis and vertical axis is known as the minor axis .

Here, x-intercepts are (5,0) , (-5,0) , take a = 5

y-intercepts are (0,3) , (0,-3) , take b = 3

As a > b , it is a horizontal ellipse .

On putting a = 5 and b = 3 , we get equation as

\frac{x^2}{5^2}+\frac{y^2}{3^2} =1\\ \frac{x^2}{25}+\frac{y^2}{9} =1

5x÷y=15 y does not equal to...

Mathematics 24/02/2020 05:29 AM answersmine

Answer:

the required answer is 3...

What is the meaning of slaughtering​

Medicine 24/02/2020 05:29 AM answersmine
The meaning is scary

Please help! Please name 4 facts or statistics that prove interest in art is declining or something negative happening around art. Thank you :)

Arts 24/02/2020 05:27 AM answersmine
1)Loss of funding for the study of the arts in general
2)The state of finding jobs in art for recent grads
3)The emphasis on STEM studies in college entrance tests and the cuts in courses at colleges and universities for art and art schools to be established
4)Grades 1-12 have no money for arts and instead push computer arts such as Graphic Design,Multi-Media Art

This question is "Create expressions with parentheses". Need help!!​

Mathematics 24/02/2020 05:27 AM answersmine

Answer:

Lauren's Problem

Step-by-step explanation:

She fell the appropriate number of times each day for the 5 days. She fell 9 times the first day, like the equation has in parenthesis. She did it for 5 days. 5x9 is pretty much given to you. Hope this helps. :)