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3 years ago

15

What is the ratio for the surface areas of the rectangular prisms shown below, given that they are similar and that the ratio of

their edge lengths is 3:1

1 answer:

Harrizon [31]3 years ago

4 0

Answer:

9 : 1

Step-by-step explanation:

given a linear ratio = a : b, then the corresponding area ratio is

a² : b²

Here the linear ratio of their edges = 3 : 1, hence

ratio of surface areas = 3² : 1² = 9 : 1

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Ivahew [28]

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3 years ago

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Write an expression in simplest form that represents the cost for shampooing and cutting W women's hair and M men's hair

Tema [17]

Women's cut and shampoo is $20. Men's cut and shampoo is $9.

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3 years ago

a student has answered 82% of the questions correctly in the examination. He made mistakes in 9 questions Calculate the toltal n

Sonja [21]

Answer:

There is a total 50 questions.

Step-by-step explanation:

Let x = total questions in the exam

Since 82% of the test was scored correctly, that means 18% of the student's exam was scored incorrectly.

With this information we can write:

$18\%x=9$ (Given that the student made 9 mistakes)

$x=9\div18\%$ (divide 18% on both sides)

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∴ There was a total of 50 questions in the examination.

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3 years ago

12=10(s+4)+50 what is the written problem to this can you help me with the answer

muminat

Answer:

s = -7.8

Step-by-step explanation:

from the question 12=10(s+4)+50

<u>first step</u>

open the bracket and evaluate for the value of s

12=10(s+4)+50

12 = 10s + 40 + 50

12 = 10s + 90

collect or combine the like terms

12-90 = 10s

-78 = 10s

divide both side by 10

-78/10 = 10s/10

-7.8 = s

therefor s = -7.8

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3 years ago

What is the solution to the system of equations? y= -5x + 3 y=1

Scrat [10]

> y(1) = -5x + 3
-3. -3

> -2 = -5x
÷-5. ÷-5

= 0.4 = x

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3 years ago