Write the sentence as an equation. Use x to represent "a number."Twice the difference of 9 and a number yields -2.
A. 2(9 - x) = -2
B. 2x - 9 = -2
C. 9 - 2x = -2
D. 2(x - 9) = -2
Answer: A
Mathematics
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A. 10 B. 20 C. 20.5 D. 19
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Graph the equations of the system. Then solve the system to find the points of intersection.
What will be an ideal response?
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Decide whether or not the matrices are inverses of each other.
and 
A. Yes B. No
Mathematics
Find the exponential function that satisfies the given conditions.Initial mass = 476 g, halving once every 24 hours
A. m(t) = 476 ? 
24t
B. m(t) = 476 ? 
t/24
C. m(t) = 476 ? 224t
D. m(t) = 476 ? 2t/24
Mathematics