Find the product and simplify. Assume all variables represent nonnegative real numbers.(7 + 2)2

A. 49 - 4n
B. 49 + 28 + 4n
C. 49 + 4n
D. 49 - 28 + 4n


Answer: B

Mathematics

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Provide an appropriate response.Solve the equation: x + 57 = 89

A. 146 B. 32 C. -57 D. 0

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Solve the problem.The long jump record, in feet, at a particular school can be modeled by  where x is the number of years since records began to be kept at the school. What is the record for the long jump   after record started being kept? Round your answer to the nearest tenth.

A. 25.3 ft B. 25.5 ft C. 25.0 ft D. 22.4 ft

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Solve the equation. + 5 = 12

A. {- 4, 3}
B.
C.
D. ?

Mathematics

You are holding one of the tethers attached to the top of a giant character balloon in a parade. Before the start of the parade the balloon is upright and the bottom is floating approximately 20 feet above ground level. You are standing approximately a = 130 feet ahead of the balloon (see figure). ? ? Find the length l of the tether you are holding in terms of h, the height h of the balloon from top to bottom. ?

A.
B.

?


C.
D.

?


E.

Mathematics