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schepotkina [342]
4 years ago
11

Bill drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 7 hours. When Bill

Mathematics
1 answer:
RUDIKE [14]4 years ago
7 0

Answer: 315 miles

Step-by-step explanation:

let onward speed = x mph, then distance = 7x

return speed = (x+18) mph, (same) distance = 5(x+18)

equating the two,

7x = 5(x+18)

2x = 90 ==> x = 45 mph

so distance = 7*45 = 315 miles

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Vladimir79 [104]

The length of the rectangle is 13 meters.

Given that,

  • The area of a rectangle is 117 square meters.
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We know that

The following formula should be used:

Area = length\times width\\\\117m^2 = (4+x) \times (x)\\\\117m^2 = 4x + x^2\\\\4x + x^2 - 117 = 0\\\\x^2 +4x  - 117\\\\x^2 -9x +13x - 117\\\\x (x - 9) + 13(x - 9)\\\\(x + 13) (x - 9)

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