Solve the system by substitution.8x - 7y = 307x + 5y = 93
A. {(-4, -7)}
B. ?
C. {(9, 6)}
D. {(-9, 6)}
Answer: C
Mathematics
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Solve the problem.Barbara knows that she will need to buy a new car in 4 years. The car will cost $15,000 by then. How much should she invest now at 10%, compounded quarterly, so that she will have enough to buy a new car? Round to the nearest cent.
A. $12,340.54 B. $9313.82 C. $10,104.37 D. $11,269.72
Mathematics
Name the property that justifies the statement. All variables represent real numbers. - 
? 9 = 9 ? 
A. Identity property of multiplication B. Associative property of multiplication C. Commutative property of multiplication D. Inverse property of multiplication
Mathematics
Simplify.
A. 
B. 1
C. 
D. 36
Mathematics
Solve the equation symbolically.x + 12.4 = 34.7
A. 26.3 B. 21.8 C. 23.3 D. 22.3
Mathematics