The expressions 2(x^2 – 4x– 21) - (x – 7)(x + 77) and ( x– 7)(x + k) are equivalent. What must be the value of k?
A.-148
B.-71
C.83
D.160

answer;

the correct answer

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fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

answer: the sun

explanation:

water cycle describes the evaporation of water from earth's surface, formation of clouds and precipitation water back onto the surface of earth. seventy percent of the earth is covered with water in the form of seas and oceans. the heat of the sun causes the evaporation of water from the surface of the ocean. the water vapors rise and condense to form water droplets. the collection of these water droplets form clouds which rain down again.

the evaporation of the oceans surface water as part of the water cycle is caused by the sun

the answer for this question is a= 13,622.84

step-by-step explanation: