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Vedmedyk [2.9K]
3 years ago
14

Solve for Z. 42=-7(z-3)

Mathematics
2 answers:
crimeas [40]3 years ago
6 0
42= -7(z-3) distribute in parenthesis
42= -7z +21 isolate the variable z
7z=21-42
7z= -21
Z= -21/7
Z= -3
elixir [45]3 years ago
3 0

42/7=Z-3

6=Z-3

Z=6+3

Z=9

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Answer:

Mr. Crow dimension of the lawn = 85 × 40

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Step-by-step explanation:

Let x represents the width of the rectangle,

Then According to the question,

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But we know that the perimeter of the rectangle = 2 × ( length + width)

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Therefore, the width of the rectangle, x  = 40 feet.

And, the length of the rectangle, 2 x + 5 = 2 × 40 + 5 = 85 feet.

1) The dimension of the rectangle = 85 × 40

2)The area of the rectangle = length × width = 85 × 40  = 3250 square feet.Let x represents the width of the rectangle,

Then According to the question,

The length of the rectangle = 2 x + 5

Also it is given that the perimeter of the rectangle = 250 feet.

But we know that the perimeter of the rectangle = 2 × ( length + width)

Thus, the perimeter of the rectangle = 2( 2x+5+x) = 2(3x+5) = 6x+10

If x = 30,  the perimeter of the rectangle = 6 × 30 + 10 = 190 < 250

Thus, x ≠ 10.

If x = 50,  the perimeter of the rectangle = 6 × 50 + 10 = 310 > 250

Thus, x ≠ 50

If x  = 40, the  the perimeter of the rectangle = 6 × 40 + 10 = 250 = 250

Thus, x = 40

Therefore, the width of the rectangle, x  = 40 feet.

And, the length of the rectangle, 2 x + 5 = 2 × 40 + 5 = 85 feet.

1) The dimension of the rectangle = 85 × 40

2)The area of the rectangle = length × width = 85 × 40  = 3250 square feet.

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Can someone help me?
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