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denis-greek [22]
3 years ago
7

A picture frame has a perimeter of 40 inches. Its length is 2 inches greater than one-half its width. Let w represent the width

of the picture frame, and let l represent the length. Which system of equations can be used to find the dimensions of the picture frame?
Mathematics
2 answers:
LUCKY_DIMON [66]3 years ago
8 0
L = 2 + .5W
2L + 2W = 40

SOLVING (if needed)
Substitute 2 + .5w in for l in the second equation and solve for w.
2(2 + .5w) + 2w = 40
4 + w + 2w = 40
Combine like terms and subtract 4 from both sides
3w = 36
Divide both sides by 3
w = 12 in.
l = 2 + .5w
l = 2 + .5(12)
l = 8 in.
vovikov84 [41]3 years ago
8 0

Answer:

A

Step-by-step explanation:

Yes

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Now we can easily sum the two fractions together:

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3 years ago
A balloon is rising at a constant speed of 5 ftys. A boy is cycling along a straight road at a speed of 15 ftys. When he passes
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  13 ft/s

Step-by-step explanation:

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The rate of change of d with respect to t is ...

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The distance between the boy and the balloon is increasing at the rate of 13 ft per second.

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The balloon starts at 45 feet above the boy and is moving upward at 5 ft/s, so its vertical distance from the spot under the balloon is 45+5t feet after t seconds.

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  d = √((15t)² + (45+5t)²)

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