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drek231 [11]
3 years ago
5

Select the proper placement for parentheses to speed up the addition for the expression 2 + 9 + 8 + 1 A. (1 + 2) + (9 + 8) B. (8

+ 9) + (2 + 1) C. (9 + 2) + (8 + 1) D. (8 + 2) + (9 + 1)
Mathematics
2 answers:
sleet_krkn [62]3 years ago
8 0
It's D because
(8+2) = 10
(9+1) = 10
Hope this helped. (:
irina [24]3 years ago
3 0
The answer is D. Because it is easier to add 9 and 2 and also 8 and 1.
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Step-by-step explanation:

The angles on the same side of the parallel lines and the transversal are called corresponding angles.

Corresponding angles are congruent

So 11x+1 = 10x+10

x = 10-1 = 9

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m = -2 and b = -2/3.

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posledela

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