Please help me with these 2 problems!

QUESTION POSTED AT 10/10/2019 - 09:39 AM

Related questions

Can somebody help me with this problem

Her height is growing 2.5 inchs every year

ANSWERED AT 17/10/2019 - 09:25 AM


QUESTION POSTED AT 17/10/2019 - 09:25 AM

Elaine brought 3/4poundof potato salad to a picnic. jake broughtv2/3 pound of macaroni salad .who brought more salad?explain the strategy you used to solve the problem.

Elaine brought more salad to the picnic.
To figure this question out, you have to make the fractions have common denominators. The LCM (Least Common Multiple) of 3 and 4 (the denominators of the fractions) is 12. 
3/4= 9/12 (Elaine) (Numerator times 3, Denominator times 3)
2/3= 8/12 (Jake) (Numerator times 4, Denominator times 4)

ANSWERED AT 17/10/2019 - 09:23 AM


QUESTION POSTED AT 17/10/2019 - 09:23 AM

Which calculation should be completed first to solve this story problem? Allister bought some sheet music. He bought 6 songs for $0.99 each and 1 book for $16.99. He paid $1.38 in sales tax. He gave the cashier $50. How much change should Allister get? A. total cost of all the purchases B. total cost of 6 songs C. sum of the cost of 1 song, the book, and the tax D. the change

A. total cost of all the purchases

You can't calculate the sales tax on the sheet music or the change for $50 he would have received (which requires subtracting the total cost from $50) until you know how much the sheet music cost total.

 The B) and C) options aren't  relevant to the problem. You're trying to find the amount of change he gets after paying the total cost for all the sheet music + the tax on that.

ANSWERED AT 17/10/2019 - 09:13 AM


QUESTION POSTED AT 17/10/2019 - 09:13 AM

Quadrilateral EFGH has coordinates E(a, a), F(3a, a), G(2a, 0), and H(0, 0). Find the midpoint of EF? Please show how the problem is done.

Answer:

The midpoints of the EF is (2a,a) .

Step-by-step explanation:

Definition of midpoints.

The midpoint is the point lie in middle of a line segment. It is equidistant from both endpoints .

Formula

Midpoints = (\frac{x_{2}+x_{1})}{2} ,\frac{(y_{2}+y_{1}}{2})

Quadrilateral EFGH has coordinates E(a, a), F(3a, a), G(2a, 0), and H(0, 0).

Now find out the midpoints of the  E(a, a) and F(3a, a) .

Midpoints\ of\ EF = (\frac{(3a+a)}{2} ,\frac{(a+a)}{2})

Midpoints\ of\ EF = (\frac{4a}{2} ,\frac{2a}{2})

Midpoints of EF = (2a,a)

Therefore the midpoints of the EF is (2a,a) .



ANSWERED AT 17/10/2019 - 09:01 AM


QUESTION POSTED AT 17/10/2019 - 09:01 AM

How can you use functions to solve real world problems ??

You can use functions to slove real world problems by saying if some thing cost 2 dollar you would have 1 thing

ANSWERED AT 17/10/2019 - 08:21 AM


QUESTION POSTED AT 17/10/2019 - 08:21 AM

I know the answer to this problem I just don't know how I got it. Help?

Any negative sign under a radical is characterized as i, being imaginary since it is not possible. So you are therefore left with 8/16 which is equivalent to 1/2 minus the imaginary number of i

ANSWERED AT 17/10/2019 - 08:13 AM


QUESTION POSTED AT 17/10/2019 - 08:13 AM

A. Solve the differential equation y prime equals the product of 4 times x and the square root of the quantity 1 minus y squared. b. Explain why the initial value problem y prime equals the product of 4 times x and the square root of the quantity 1 minus y squared with y(0) = 4 does not have a solution.

Answer:

Step-by-step explanation:

Given is a differential equation as:

y'=4x\sqrt{1-y^2}

We can solve this by separation of variables method

\frac{dy}{\sqrt{1-y^2} } =4xdx\\sin^{-1} y = 2x^2+C

To find C:

Given y(0) =4

Substitute x=0 and y =4

sin inverse of 4 = C

But sin inverse is valid only for values between -1 and 1

Hence C is not a real value

No solution for this.

ANSWERED AT 17/10/2019 - 08:07 AM


QUESTION POSTED AT 17/10/2019 - 08:07 AM

Stuck in this problem help please

Use trigonometry.

tan30° = perpendicular / base

Here for angle 30° , x is perpendicular while 10 is the base.

tan30° = 1/√3
1/√3 = x/10
x = 10/✓3

By rationalising
x = 10√3/3

Hope This Helps You!

ANSWERED AT 17/10/2019 - 07:14 AM


QUESTION POSTED AT 17/10/2019 - 07:14 AM

Is the given answer a reasonable solution to the problem? 7.92 • 10.21 = 808.632 A. No B. Yes REALLY NEED HELP IF YOU DONT KNOW PLEASE DONT ANSWER

Oh ok I am in middle school how would I know

ANSWERED AT 17/10/2019 - 05:47 AM


QUESTION POSTED AT 17/10/2019 - 05:47 AM

A. Describe a dilation (center and scale factor) that transforms triangle RST into triangle R'S'T' or explain why it cannot be done. b.In either case, use complete sentences to describe the relationship that exists between the corresponding sides and angles (I'll attach the illustration for the problem below)

Answer:  The center of dilation is the origin (0, 0) and scale factor is 3.

Step-by-step explanation:  We are given to describe a dilation that that transforms ΔRST to ΔR'S'T', or to explain why it cannot be done.

We can see in the figure provided that both the triangles are right-angles at angles S and S'

Also, RS = ST = 1 unit   and   R'S' = S'T' = 3 units.

Using Pythagoras theorem, we have

RT^2=RS^2+ST^2=1^2+1^2=2\\\\\Rightarrow RT=\sqrt 2,

and

R'T'^2=R'S'^2+S'T'^2=3^2+3^2=18\\\\\Rightarrow R'T'=3\sqrt 2.

Therefore, the ratio of the corresponding sides will be

\dfrac{R'S'}{RS}=\dfrac{3}{1}=3,~~\dfrac{S'T'}{ST}=\dfrac{3}{1}=3,~~~\dfrac{R'T'}{RT}=\dfrac{3\sqrt 2}{\sqrt 2}=3\\\\\\\dfrac{R'S'}{RS}=\dfrac{S'T'}{ST}=\dfrac{R'T'}{RT}=3.

Since the ratio of the corresponding sides are equal, so the two triangles are similar.

Hence, ΔRST can be dilated to form ΔR'S'T'.

The center of dilation will be origin (0, 0), because the shapes of the two triangles are same with respect to the origin.

Also, since the ratio of any two corresponding sides of the triangles is 3, so the scale factor is 3.

Thus, ΔRST can be dilated to ΔR'S'T' with origin (0, 0) as the center of dilation and scale factor 3.

ANSWERED AT 17/10/2019 - 05:33 AM


QUESTION POSTED AT 17/10/2019 - 05:33 AM

Can someone help me with the rest of the problems not 1,2 or 5 though

3. This was spun 50 times, and it landed on yellow 6 times. Therefore, it won't land on yellow all but 6 times. P(not yellow) is 44/50, or 22/25.
4. If 50 students are asked, and 7 have a dog, then the probability is 7/50. We can use a proportion to find the equivalent of 7/50 with a denominator of 1400, because that is how many people are at the school. 7/50=x/1400. 50x=9800. x=196

ANSWERED AT 17/10/2019 - 05:15 AM


QUESTION POSTED AT 17/10/2019 - 05:15 AM

Help answer these problems please

I dont know loo it up

ANSWERED AT 17/10/2019 - 05:08 AM


QUESTION POSTED AT 17/10/2019 - 05:08 AM

Identify the corresponding word problem given the equation: x + 12.50 = 55.75

X= 43.23+12.50=55.75

ANSWERED AT 17/10/2019 - 05:05 AM


QUESTION POSTED AT 17/10/2019 - 05:05 AM

Help me with this problem I think I did it wrong!

(2x^2-27x+91) is the right answer

ANSWERED AT 17/10/2019 - 04:44 AM


QUESTION POSTED AT 17/10/2019 - 04:44 AM

Please help me with this problem

The answer is B, 3/4 miles to 1/2 inch which means 1.5 miles to 1 inch, because in the second map, the inches were divided by 2, making the map smaller, therefore we should double the scale to get the same measurments

ANSWERED AT 17/10/2019 - 04:02 AM


QUESTION POSTED AT 17/10/2019 - 04:02 AM

Someone one help me it involves problem solving with linear models i believe it is c

Y-intercept in this case means the average cost of a ticket in year 2005

then it increased

So it is A


If you still need help, just let me know!

 

ANSWERED AT 17/10/2019 - 03:50 AM


QUESTION POSTED AT 17/10/2019 - 03:50 AM

Solve this problem : 2x- 3 (y-2x) + (-5) (-2y)

2x - 3(y - 2x) + (-5)(-2y)

Simplify everything.

2x - 3y + 6x + 10y

Add like terms.

(2x + 6x) + 10y

8x + 10y

~Hope I helped!~


ANSWERED AT 17/10/2019 - 03:24 AM


QUESTION POSTED AT 17/10/2019 - 03:24 AM

Please answer and explain how you received that answer, these are the three problems I had trouble with out of 18

9) x.14 = 6.26 ==> 14x=156 ==> x=11.1

12) OAB = Right Triangle : (27+24)² = 24² + AB² (Pythagoras)
 ==> 51² =24² + AB²  ==> 2,601 = 576 + AB² ==> AB² = 2,601 - 576 = 2,025
==> AB² = 2015 AND AB =√2025 = 45
Sorry I can't read the last page

ANSWERED AT 17/10/2019 - 03:19 AM


QUESTION POSTED AT 17/10/2019 - 03:19 AM

A store buys frozen burritos from a supplier for $1.40 each. The store adds a markup of 80% to determine the retail price. This month the store is putting the burritos on sale for 25% off the retail price. What is the sale price of the burritos? Complete the explanation of the solution for this problem.

$1.40  -  price from a supplier = 100%
100% + 80% = 180% = 1,8  -  the retail price

1,40 * 1,8 = $2,52 - the retail price 

100% - 25% = 75% = 0,75  -  on sale for 25% off 

2,52 * 0,75 = $1,89  -   the sale price.


ANSWERED AT 17/10/2019 - 03:11 AM


QUESTION POSTED AT 17/10/2019 - 03:11 AM

The following graph shows the distance Thomas is from his home (in meters) for a period of 2 minutes. Determine the average rate of change for the first 50 seconds, explain what this means in context of the problem. Then find the average rate of change for the 70 remaining seconds

The answer:
the average rate of change for the first 50 seconds:
it  is v= 100 m/ 50 s = 2 m/s
Thomas speed is 2 m in each second for the first 50 seconds.

The average rate of change for the 70 remaining seconds:
the time is between [70; 120]
so the distance is d= 200m - 40m= 160m
the average rate is
v= 160m / 70 s = 2 . 28m /s

ANSWERED AT 17/10/2019 - 03:09 AM


QUESTION POSTED AT 17/10/2019 - 03:09 AM

Can or is x be negative in a problem such a 4-.5x=4-x?

4-0.5x=4-x
Add 0.5x for both side
4-0.5x+0.5x=4-x+0.5x
4=-0.5x+4
Subtract 4 for both side
4-4=-0.5x+4-4
0=-0.5x
Divide -0.5 for both side
0/-0.5=-0.5x/-0.5
0=x. As a result, x can not be negative in this problem. Hope it help!

ANSWERED AT 17/10/2019 - 01:41 AM


QUESTION POSTED AT 17/10/2019 - 01:41 AM

Help with this problem please show work too thank you

Gien made 16 muffins and 1/4 of them had nuts, so 16 x 1/4 = 4
Gien made 4 muffins with nuts

Catrina made 1 less muffin than Gien, so 16-1=15, so Catrina made 15 muffins. 1/3 of them had nuts, so 15 x 1/3 = 5
Catrina made 5 muffins with nuts

Lisa and Meg both made 3 more muffins than Catrina, so 15+3=18
Lisa and Meg made 18 muffins each

Lisa made 1/3 of her muffins with nuts, so 18 x 1/3 = 6
Lisa made 6 muffins with nuts

Meg made 1/2 of her muffins with nuts, so 18 x 1/2 = 9
Meg made 9 muffins with nuts

They don't say how many muffins Wayne made so we have to use information from the beginning. There were 87 muffins total so we need to add up the total number of muffins made by the other kids (16+15+18+18=67) and then subtract that from 87 (87-67=20)
Wayne made 20 muffins

Wayne made 1/4 of her muffins with nuts, so 20 x 1/4 = 5
Wayne made 5 muffins with nuts

So, now you just need to add up all of the muffins made with nuts
4+5+6+9+5=29

29 of the muffins had nuts

ANSWERED AT 17/10/2019 - 01:32 AM


QUESTION POSTED AT 17/10/2019 - 01:32 AM

Help with this problem please show work too thank you

Glenn made 16 muffins- 1/4 of 16= 4 muffins with nuts
Catrina made 15 muffins- 1/3 of 15= 5 muffins with nuts
Lisa made 18 muffins- 1/3 of 18= 6 muffins with nuts
Meg made 18 muffins- 1/2 of 18= 9 muffins with nuts
4+5+6+9= 24
Subtract 87-24= 60
Wayne made 60 muffins- 1/4 of 60= 15 muffins with nuts
4+5+6+9+15= 39 muffins with nuts in all

ANSWERED AT 17/10/2019 - 01:32 AM


QUESTION POSTED AT 17/10/2019 - 01:32 AM

Solve the following problem: jason is 11 times older then zack. The sum of their ages is 48. How old is zack?

Let j represent Jason
z represent zark

j=11z

j+z=48
11z+z=48
12z=48
z=4
j=44. As a result, Zack is 4 years old and Jason is 44 years old. Hope it help!

ANSWERED AT 17/10/2019 - 01:24 AM


QUESTION POSTED AT 17/10/2019 - 01:24 AM

Please show me how to do the circled problem and include all steps

Derivatives. Fun, honestly. Anyways ...
Here's I would do it.

Take the radical out
1/(x+2)^(1/2)

Put it on top
(x+2)^(1/2)

Apply power rule
(1/2)(x+2)^((1/2)-1)
((x+2)^(-1/2))/2

Put it on the bottom
1/(2(x+2)^(1/2))

Put it back in radical form
1/(2√(x+2))


Hope I explained it well for you!

ANSWERED AT 17/10/2019 - 01:23 AM


QUESTION POSTED AT 17/10/2019 - 01:23 AM