# Please help me with these 2 problems!

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

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

The answer is

3. D

4. A

3. D

4. A

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

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

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.

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

**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

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 = (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

6 quarters and 2 nickels

ANSWERED AT 17/10/2019 - 08:50 AM

QUESTION POSTED AT 17/10/2019 - 08:50 AM

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

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

**Answer:**

**Step-by-step explanation:**

Given is a differential equation as:

We can solve this by separation of variables method

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

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!

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

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

**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**

**and**

**Therefore, the ratio of the corresponding sides will be**

**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

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

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

I dont know loo it up

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

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

X= 43.23+12.50=55.75

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

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

(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

I just toke that test and the answer is B

ANSWERED AT 17/10/2019 - 04:27 AM

QUESTION POSTED AT 17/10/2019 - 04:27 AM

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

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

then it increased

So it is A

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

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

Simplify everything.

2x - 3y + 6x + 10y

Add like terms.

(2x + 6x) + 10y

8x + 10y

~Hope I helped!~

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

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

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

$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.**

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 =

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

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

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

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

118.

119.

120.

119.

120.

ANSWERED AT 17/10/2019 - 03:04 AM

QUESTION POSTED AT 17/10/2019 - 03:04 AM

It is should be definitely B

ANSWERED AT 17/10/2019 - 02:57 AM

QUESTION POSTED AT 17/10/2019 - 02:57 AM

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!

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

X + 2x+7 + x- 12 = 131

ANSWERED AT 17/10/2019 - 01:40 AM

QUESTION POSTED AT 17/10/2019 - 01:40 AM

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

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

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

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

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!

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

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!

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