Solving Proportions Quiz

What is the cross multiplication method used for in solving proportions?

• To find the missing value in a proportion equation.

• To determine the volume of a cylinder

• To calculate the area of a triangle

• To find the square root of a number

Tags

CCSS.7.RP.A.2A

If a/b = c/d, what is the cross product of a and d?

• ad

• bc

• ac

• bd

Tags

CCSS.7.RP.A.2A

Solve the proportion: 3/5 = x/15

• 9

• 12

• 5

• 7

Tags

CCSS.7.RP.A.2B

In the proportion a/b = c/d, what is the product of a and d?

• ac

• cd

• ab

• ad

Tags

CCSS.7.RP.A.2A

If 2/3 = 4/x, what is the value of x?

• 12

• 10

• 6

• 8

Tags

CCSS.7.RP.A.2B

What is the first step in solving a word problem involving proportions?

• Identify the known values and the unknown value

• Guess the answer

• Solve for all the values at once

• Ignore the known values

Tags

CCSS.7.EE.B.3

If 5/8 = y/20, what is the value of y?

• y = 18

• y = 12.5

• y = 15

• y = 10

Tags

CCSS.7.RP.A.2B

Solve the proportion: 4/7 = 12/x

• x = 28

• x = 16

• x = 9

• x = 21

Tags

CCSS.7.RP.A.2C

What is the key to solving proportions with variables?

• Add the variables together and divide by the constant

• Subtract the variables and multiply by the constant

• Divide the variables and add the constant

• Cross multiply and solve for the variable

Tags

CCSS.6.EE.B.7

If 3/4 = 15/x, what is the value of x?

• 5

• 10

• 25

• 20

Tags

CCSS.7.RP.A.2B