Chapter 8 Review

QuizÂ by Heather Offermann

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12 questions
• Q1
If Jerry earns \$100 per hour, name the quantity that is constant.
hours worked
hours
amount earned
\$100/hour rate
30s
• Q2
If Jerry earns \$100 per hour, which quantity depends on the other?
Earnings depends on time
Time depends on earnings
Rate depends on time
Earnings depends on \$100 rate
30s
• Q3
Which equation represents Jerry earning \$100 per hour?
t=100e
e=100t
100t
e=t/100
30s
• Q4
If Jerry earns \$100 per hour, how much will he earn if he works 15.5 hours?
e=1,550
He earns \$1,550.
He earns \$115.50.
1,550
30s
• Q5
Sally joined LA Fitness at a rate of \$100 the first month and \$50 each additional month. Which equation represents the amount she will be charged? Let c = total cost in dollars and m = time in months.
c = 50m + 100
c = 100 + 50(m - 1)
c = 100 + 50m
c = 150m
30s
• Q6
Given the points A (1, 16), B (2, 12), and C (3, 8) calculate the unit rate of change.
4
-4
+4
12
45s
• Q7
Solve 42 = 1/5 x +12
x = 6
x = 270
x = 198
x = 150
60s
• Q8
Solve 2 (4x - 8) +2x = 24
x = 4/5 or 0.8
x = 5
x = 4
x = 3 1/3 or 3.3333
60s
• Q9
Bob is landing his glider. He is at 8,750 feet and beginning his descent. He descends at a rate of 350 feet per minute. Identify the Dependent and Independent Variables:
IV: t = time in minutes & DV: h = height in feet
IV: f = feet & DV: m = minutes
IV: height in feet & DV: time in minutes
IV: h = height in feet & DV: t = time in minutes
45s
• Q10
Bob is landing his glider. He is at 8,750 feet and beginning his descent. He descends at a rate of 350 feet per minute. Which equation represents Bob's situation?
h = 8,750t
8,750 - 350t
8,750 = - 350t
h = 8,750 - 350t
45s
• Q11
Bob is landing his glider. He is at 8,750 feet and beginning his descent. He descends at a rate of 350 feet per minute. How long will it take the glider land?
25 feet
8,400 minutes
25 minutes
8,400 feet
60s
• Q12
Bob is landing his glider. He is at 8,750 feet and beginning his descent. He descends at a rate of 350 feet per minute. At what time will the glider be at an altitude of 7,350 feet?
4 feet
21 feet
4 minutes
21 minutes
60s

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