Use the graph of the function to estimate the x-intercepts.f(x) = 4x2 - 20x + 21
A. x = 1.5, x = 3.5
B. x = -29, x = 21
C. x = 6, x = 14
D. x = -3.5, x = -1.5
Answer: A
Mathematics
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Simplify the expression.sin x cos(x + y) + cos x sin(x + y)
A. cos(2x + y) B. sin(2x + y) C. cos y D. sin y
Mathematics
Construct a truth table for the statement.~((w ? t) ? s)
A. 
| T | T | T | T |
T F T T
T F F F
F T T T
F T F F
F F T F
F F F T
B.
| T | T | T | F |
T F T F
T F F T
F T T F
F T F T
F F T F
F F F T
C.
| T | T | T | T |
T F T T
T F F F
F T T T
F T F F
F F T T
F F F F
D.
| T | T | T | T |
T F T T
T F F F
F T T T
F T F F
F F T F
F F F F
Mathematics
Use modular arithmetic to find the answer.Fill in the blank so that the answer is nonnegative and the least possible number.20 ? ___ (mod 5)
A. 6 B. 2 C. 4 D. 0
Mathematics
The wages of the employees of a company are presented in this histogram. Answer the question.
How many employees earn at least $4 and less than $6 an hour?
A. 10 B. 20 C. 34 D. 22
Mathematics