Inverse Variation

If y varies inversely as x, and y = 32 when x = 3, find x when y = 15.

• 3/5

• 8/5

• 16/5

• 32/5

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.3

CCSS.HSA.SSE.A.1

If x varies inversely as the square root of y, and x = 9 when y = 121, find x when y = 81.

• 7

• 11

• 13

• 17

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.CED.A.2

CCSS.HSF.BF.A.1

The current in a simple electrical circuit is inversely proportional to the resistance. If the current is 80 amps when the resistance is 50 ohms, find the current when the resistance is 22 ohms.

• 90 amps

• 100 amps

• 105 amps

• 120 amps

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.CED.A.4

CCSS.HSA.REI.B.3

If y varies inversely as x, and y = 23 when x = 8, find y when x = 4.

• 26

• 46

• 52

• 92

Tags

CCSS.7.EE.B.3

CCSS.7.EE.B.4

If y varies inversely as x, and y = 14 when x = 8, find y when x = 7.

• 16

• 20

• 24

• 28

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.3

CCSS.HSA.SSE.A.1

If x varies inversely as y, and x = 3 when y = 8, find y when x = 4.

• 3

• 6

• 9

• 12

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.CED.A.2

CCSS.HSA.REI.B.3

If 32 men can reap a field in 15 days, in how many days can 20 men reap the same field?

• 18 days

• 20 days

• 22 days

• 24 days

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3

CCSS.HSA.SSE.A.1

12 men can dig a hole in 8 days. How many men can dig it in 6 days?

• 14 men

• 16 men

• 18 men

• 20 men

Tags

CCSS.7.EE.B.3

CCSS.7.RP.A.2

CCSS.7.RP.A.3

y varies inversely with x. If y = 40 when x = 16, find x when y = -5.

• -64

• -128

• -256

• -512

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.CED.A.2

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.3

CCSS.HSA.SSE.A.1

What is the constant of variation of the equation, x = 29/y?

• 0

• 1

• 29

• y

Tags

CCSS.HSA.CED.A.4