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4 years ago

The formula P=2l+2w solve for w not l

1 answer:

8 0

That's the perimeter of a rectangle or parallelogram.

$p = 2l + 2w$

$p - 2l = 2w$

$\frac 1 2(p- 2l) = 2$

$w = \frac p 2 - l$

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3 years ago

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3 years ago

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3 years ago

Solve: 25x2 − 30 = 0 round the answer to the nearest hundredth. x = −1.10 and x = 1.10 x = −26.15 and x = 1.15 x = 0 x = −0.83 a

Margaret [11]

Answer:

(a) x = -1.10 and x = 1.10

Step-by-step explanation:

A straightforward square root will give the value of x.

<h3>Solution</h3>

Divide by the coefficient of x^2:

x^2 -30/25 = 0

x^2 -1.20 = 0

Add 1.20, and take the square root.

x^2 = 1.20

x = ±√1.20 ≈ ±1.0954

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Additional comment

For small values of x, the root of (1+x) is approximately 1+x/2. For a root accuracy to the nearest hundredth, x < 0.21 (as here). For accuracy to the nearest thousandth, x < 0.064.

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3 years ago

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