Multiply and simplify.5x ? 3x

A. 45x2
B. 45x2m3
C. 45x2m
D. 15x2m


Answer: C

Mathematics

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Evaluate the expression.(-7)2

A. -14 B. -49 C. 14 D. 49

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Provide an appropriate response.Write as an ordinary number: 3.5 ? 103

A. 0.0035 B. 3,500 C. 0.035 D. 35,000

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Combine like terms.-7y - 3x - 4x

A. -14xy B. -7y - 7x C. -7y + 1x D. -7y - 1x

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Solve the problem.An experimental model for a suspension bridge is built. In one section, cable runs from the top of one tower down to the roadway, just touching it there, and up again to the top of a second tower. The towers are both 12.25 inches tall and stand 70 inches apart. At some point along the road from the lowest point of the cable, the cable is 1.1 inches above the roadway. Find the distance between that point and the base of the nearest tower.

A. 24.7 in. B. 10.7 in. C. 24.5 in. D. 10.3 in.

Mathematics