4 years ago

Which expression is equivalent to 5x + 2 - x + 10?

Mathematics

1 answer:

lara31 [8.8K]4 years ago

8 0

Answer:

4x +12

Step-by-step explanation:

$5x + 2 - x + 10\\\\\mathrm{Group\:like\:terms}\\=5x-x+2+10\\\\\mathrm{Add\:similar\:elements:}\:5x-x=4x\\=4x+2+10\\\\\mathrm{Add\:the\:numbers:}\:2+10=12\\=4x+12$

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The length of a rectangular room is 4 feet longer than twice the width. if the room's perimeter is 200 feet, what are the room's

Lera25 [3.4K]

P = 2(L + W)
P = 200
L = 2W + 4

200 = 2(2W + 4 + W)
200 = 2(3W + 4)
200 = 6W + 8
200 - 8 = 6W
192 = 6W
192/6 = W
32 = W <== the width is 32 ft

L = 2W + 4
L = 2(32) + 4
L = 64 + 4
L = 68 <=== the length is 68 ft

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