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MATH 100 POINTS

8.
(01.05 MC)

A contractor can spend at most $250 a day on operating costs and payroll. It costs $45 each day to operate the forklift and $60 a day for each crew member. Write an inequality to represent the contractor's budget for the day. (1 point)

60x + 45 ≥ 250

60x + 45 ≤ 250

60 − 45x ≥ 250

60 − 45x ≤ 250
9.
(01.06 LC)

Which equation is equivalent to the formula r = st? (1 point)

t equals s over r

t = rs

s equals r over t

s = rt
10.
(01.06 LC)

A car can travel 25 miles per gallon. Approximately how many gallons of fuel will the car need to travel 30 km? (1 point)

[1 mile = 1.6 km]

0.05

0.52

0.75

0.83
11.
(02.01 LC)

Which of the following tables represents a function? (1 point)

x 4 4 9 9
y 2 −2 3 −3

x 2 −2 3 −3
y 4 4 9 −9

x 1 −1 1 −1
y 4 5 6 7

x 5 5 6 6
y 1 2 3 4
12.
(02.02 MC)

The total cost f(x), in dollars, for renting a car for a day and driving it x miles is shown:

f(x) = 90 + 0.11x

What does f(30) represent? (1 point)

The number of dollars spent to rent the car for 30 days

The number of miles driven on the car in 30 days

The number of dollars it costs to drive the car 30 miles

The number of miles driven for a cost of $30
13.
(02.02 MC)

The graph represents the money collected at the movie theater on Saturday. Find the domain when the maximum number of people allowed in the movie theater is 30 people. (1 point)

graph of y equals 2 times x plus 40 with x axis labeled Number of People and y axis labeled Amount of Money

0 ≤ y ≤ 30

40 ≤ x ≤ 100

0 ≤ x ≤ 30

40 ≤ y ≤ 100
14.
(02.03 MC)

Ricky walked away from a mall at a constant velocity for the first 30 seconds. He stopped at an ice cream parlor for 40 seconds. He then turned around and walked toward the mall again at a constant velocity for 10 seconds. He met a friend, and they both walked away from the mall at a constant velocity for the next 20 seconds. Which of the following graphs best represents Ricky's motion? (1 point)

first straight line joins ordered pairs 0, 0 and 30, 20, second straight line joins 30, 20 and 70, 20, third straight line joins 70, 20 and 80, 30, and fourth straight line joins 80, 30 and 100, 0

first straight line joins ordered pairs 0, 0 and 30, 20, second straight line joins 30, 20 and 40, 5, third straight line joins 40, 5 and 60, 50

first straight line joins ordered pairs 0, 0 and 30, 20, second straight line joins 30, 20 and 70, 20, third straight line joins 70, 20 and 80, 5, and fourth straight line joins 80, 5 and 100, 50

first straight line joins ordered pairs 0, 0 and 30, 20, second straight line joins 30, 20 and 70, 20, third straight line joins 70, 20 and 80, 5, and fourth straight line joins 80, 5 and 90, 50
15.
(02.04 LC)

Choose the graph that correctly corresponds to the equation y = −4. (1 point)

graph of a horizontal line through the point 0, 4

graph of a vertical line through the point 4, 0

graph a horizontal line through the point 0, negative 4

graph of a vertical line through the point negative 4, 0

1 Answer

3 votes

Answer:

  1. To represent the contractor's budget for the day, the inequality is 60x + 45 ≤ 250.
  2. The equation equivalent to the formula r = st is s = rt.
  3. To travel 30 km, the car will need approximately 0.83 gallons of fuel.
  4. The table that represents a function is the one with x values that do not repeat and have only one corresponding y value for each x value.
  5. f(30) represents the number of dollars it costs to drive the car 30 miles.
  6. When the maximum number of people allowed in the movie theater is 30 people, the domain is 0 ≤ x ≤ 30.
  7. The graph that best represents Ricky's motion is the one with a straight line joining ordered pairs 0, 0 and 30, 20, a straight line joining 30, 20 and 70, 20, a straight line joining 70, 20 and 80, 5, and a straight line joining 80, 5 and 90, 50.
  8. The graph that correctly corresponds to the equation y = -4 is a horizontal line through the point 0, -4.
User Hendrik Beenker
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