WGU C278 - College Algebra Pre-Assessment 2021/2022 QUESTIONS AND ANSWERS

C278 - College Algebra Pre-Assessment
Which number is irrational
a. 23
b. -√7
c. √121
d. -5 Correct Answer: b. -√7

Which graph corresponds to the set of real numbers
{-4.25, -π, , 2.75}? Correct Answer: <__•|____•|______________________•|__•|____>
-4 -3 -2 -1 0 1 2 3 2 3

The following formula F= 9/5C + 32 is used to convert a Celsius ( C) temp to its corresponding Fahrenheit
( F).
What is the temp in F if temp is -10 Celsius?
a. 14.0 F
b. 26.4 F
c. 50.0 F
d. 37.6 F Correct Answer: 14.0 Fahrenheit (F)
9/5(-10) + 32

Driver A travels west from Boston at a constant speed of 60 mph. Driver B leaves three hours later from
Boston and follows Driver A at a constant speed of 72 mph.
How many hours take Driver B to catch Driver A?
a. 12 hours
b. 15 hours
c. 18 hours
d 20 hours Correct Answer: 72 x 15 hours = 1080 miles
60 x 18 hours = 1080 miles

Answer 15 hours

What is the solution to x + 4 < 4 x - 5 expressed in interval notation?
a. { - ∞ ,3}
b. {{4\3},∞ }
c.{3,∞ }
d. {9,∞ } Correct Answer: ( {3,∞ } )

Which graph represents the following equation?
y = \(\frac{1}{2}x - 4\) Correct Answer: Graph 4

What is the slope of the line that passes through the points (0,-8) and (1/2, 4)
a. -24
b. -8
c. 8
d. 24 Correct Answer: Answer 24