Solve.An equilateral triangle has a side length of 7 units. Find its perimeter.
A. 28 units
B. 21 units
C. 14 units
D. not enough information given
Answer: B
Mathematics
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Solve.Recall that 
is the formula for the area of a square. If the area of a square is represented by 
how can the length of each side be represented?
A. 2x - 6 B. (2x - 6)2 C. 2x + 6 D. (2x + 6)2
Mathematics
Express the number in terms of powers of the numbers in the expression.5 ? 7 ? 5
A. 5 ? 72 B. 5 ? 7 C. 52 ? 7 D. 2(5) ? 7
Mathematics
Solve for the variable.-8x - 20 = -9x - 6
A. 15 B. 14 C. -3 D. 13
Mathematics
Solve using the elimination method.2 x - y = 8-2 x + y = -8
A. No solution B. (4, 6) C. (6, 5) D. Infinite number of solutions
Mathematics