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3 years ago

This is correct right?

Mathematics

1 answer:

meriva3 years ago

4 0

No, you have to distribute before adding

You distribute it like: 5x3 5x4, to get 15 and 20, then add it together

hope that helps :)

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A doctor has a jar of 22 lollipops; 12 are lime; 7 are cherry; 2 are grape and 1 is orange, if jennifer and seth both take and e

MrRissso [65]

The chance is low cause there is very little of the lolipops

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3 years ago

Dilate a triangle with vertices (0,0), (0,2) and (2,0) using the scale factor k=3. What is the value of the ratio (new to origin

seropon [69]

Answer:

Part a) The ratio of the perimeters is $3$

Part b) The ratio of the areas is $9$

Step-by-step explanation:

Part A) What is the value of the ratio (new to original) of the perimeters?

we know that

If two figures are similar, then the ratio of its perimeters is equal to the scale factor

Let

z-----> the scale factor

x-----> the perimeter of the new triangle

y-----> the perimeter of the original triangle

$z=\frac{x}{y}$

we have

$z=3$

substitute

$\frac{x}{y}=3$

Part B) What is the value of the ratio (new to original) of the areas?

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z-----> the scale factor

x-----> the area of the new triangle

y-----> the area of the original triangle

$z^{2}=\frac{x}{y}$

we have

$z=3$

substitute

$\frac{x}{y}=3^{2}$

$\frac{x}{y}=9}$

3 0

4 years ago

3 2/5 miles in 7/8 hour as a unit rate

Citrus2011 [14]

Answer:

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Step-by-step explanation:

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3 years ago

A car travels 0.75 miles per minute. Explain how you could use proportional reasoning to find how far the car travels in one hou

Zina [86]

Notice the proportions below. Keep in mind that 1 hour is 60 minutes.

$\bf \begin{array}{ccll}
miles&minutes\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
0.75&1\\
x&60
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4 0

3 years ago

Naomi and Claire are painting a mural. Naomi paints 2 square feet per hour and has already painted 16.5 square feet.

mrs_skeptik [129]

Answer:

4.5 hours

Step-by-step explanation:

let t be the time elapsed

Therefore, we can set up a system of equations and solve accordingly

2t + 16.5 = 4t + 7.5

2t = 9

t = 4.5 hours more till they paint the same amount in square feet

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3 years ago