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hichkok12 [17]
3 years ago
15

One number is 11 less than the other number if their sum is increased by 8 the results is 71

Mathematics
1 answer:
liubo4ka [24]3 years ago
7 0

x = number 1

x - 11 = number 2

(x + x-11) + 8 = 71

Simplify the left side.

2x - 3 = 71

Add 3 to both sides

2x = 74

Divide both sides by 2

x = 37

x - 11 = (37) - 11 = 26

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Answer: choice B, 40.5 degrees

The triangle is isosceles based on the fact that AC = BC (the tick marks are the same). The angles opposite the congruent sides are also congruent

angle A = angle B = x for some unknown number x

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==============================

Edit

The sides with the two tick marks are the same length, so 7x-4 is the same as length as 31

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Answer is choice B) 5

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