Solve the problem.A collection of dimes is arranged in a triangular array with 13 coins in the base row, 12 in the next, 11 in the next, and so on with 1 dime in the last row. Find the value of the collection.
A. $4.55
B. $0.91
C. $18.20
D. $9.10
Answer: D
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Write the English phrase as an algebraic expression. Let x represent the number. Simplify the expression, if possible.The quotient of 61 and a number
A. 61x
B. 
C. 61 - x
D. 
Solve the problem.The number of centimeters, d, that a spring is compressed from its natural, uncompressed position is given by the formula 
where W is the number of joules of work done to move the spring and k is the spring constant. If a spring has a spring constant of 0.6, find the amount of work needed to move the spring 5 centimeters.
A. 15 joules B. 1.5 joules C. 25 joules D. 7.5 joules
Multiply.(2p + 3)(2p - 3)
A. 4p2 + 12p - 9 B. p2 - 9 C. 4p2 - 12p - 9 D. 4p2 - 9
Solve for x.-0.08x + 0.15(900 - x) = 0.27x
A. 67.5 B. 270 C. 540 D. 675