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den301095 [7]
1 year ago
6

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

nd x = 0.83
Mathematics
1 answer:
Margaret [11]1 year ago
4 0

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

  x ≈ -1.10 and 1.10 . . . . . round to hundredths

__

<em>Additional comment</em>

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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Valentin [98]

Answer:

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Step-by-step explanation:

Make 5 1/7 into improper fraction

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3 years ago
4) Arnold ate breakfast at a restaurant. His total came to $76.75. There is an 8% sales tax and 15% tip. What is Arnold's total
lisov135 [29]

Answer:

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Step-by-step explanation:

Given:

Total came to $76.75. There is an 8% sales tax and 15% tip.

Now, to find the total cost.

<em>8% sales tax is there so we calculate the amount after adding sales tax:</em>

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Now, <em>the cost after 15% tip:</em>

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The cost after the tip is $95.32.

Therefore, the total cost is $95.32.

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Step-by-step explanation:

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2 years ago
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watch a video or use a hint.

Step-by-step explanation:

it say it.

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