7.20 Unit 7 Test Part 1 Spring 2020 TVAH 1) The function h is defined by h(x) = 5x − 2.
What is the value of h(8) ?

A) 38
B) 30
C) 50
D) 42

2) What is the solution to the equation?
c/35=3/5

E) 7
F) 15
G) 28
H) 21

3) The function f(x) varies directly with x and f(x) = 90 when x = 30.
What is f(x) when x = 6?

A) 18
B) 15
C) 5
D) 2

4) The function f(x) varies inversely with x and f(x) = 2 when x = 16.
What is f(x) when x = 4?

E) 128
F) 40
G) 72
H) 8

5) The amount of sales of tickets at a movie theater t(x) varies directly with the number of customers x. Twenty customers paid a total of $275 for tickets.
Which equation can be used to find the ticket sales for x customers?

A) t(x) = 13.75x
B) t(x) = 13.75/x
C) t(x) = 20x
D) t(x) = 275x

6) The pressure of a gas p(v) varies inversely with the volume of the gas v. The pressure of a gas measures 8kg/cm2 when its volume is 40cm3 .
Which equation can be used to find the pressure of the gas when the volume is changed?

E) p(v) = 5/v
F) p(v) = 320v
G) p(v) = 5v
H) p(v) = 320/v

9) The scale factor of the blueprint of a theater stage to the actual theater stage is 1 in/6 ft . The area of the stage on the blueprint is 48in2.
What is the area of the actual stage?

A) 288 ft2
B) 1,728 ft2
C) 10,368 ft2
D) 864 ft2

10) The scale factor of a model of a grain silo to the actual silo is 1 to 10. The volume of the actual silo is 550m3 .
What is the volume of the model?

E) 27.5 m3
F) 2.75 m3
G) 5.5 m3
H) 0.55 m3