Identify the following as an equation or an expression.16 + 2(x - 9) = 18 - x
A. Equation
B. Expression
Answer: A
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Solve the system of linear equations using matrices.
A. (4, -5) B. (-5, -4) C. ? D. (-5, 4)
Write as the sum and/or difference of logarithms. Express powers as factors. log7
A. 
log7p + 
log7q - 
log717
B. 
log7p ? 
log7q ÷ 
log717
C. 
log7pq - 
log717
D. 
log7p + 
log7q - log717
The lengths of one leg, a, and the hypotenuse, c, of a right triangle are given. Find the length of the remaining leg.a = 20, c = 52
A. 52 B. 38 C. 20 D. 48
Solve the problem.An explosion causes debris to rise vertically with an initial velocity of 7 feet per second. The function 
describes the height of the debris above the ground, s(t), in feet, t seconds after the explosion. What is the instantaneous velocity of the debris when it hits the ground?
A. 112 feet per second B. -224 feet per second C. -112 feet per second D. 224 feet per second