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ratelena [41]
2 years ago
5

Keiko estimated the height of her office building to be 45 ft. The actual height of her office building is 42 ft

Mathematics
1 answer:
sergij07 [2.7K]2 years ago
7 0

% error formula: | true value minus "your" (as in Keiko's) value | over true value, times 100.

so: 42 - 45 = 3 (it would be negative but we used absolute value, which is how it is supposed to be done. <u><em>3 is your absolute error</em></u>).

3/42 = 0.07143

0.07142 * 100 = <u><em>7.142%</em></u>. she was only 7.142% off from the right answer.

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I am thinking of a number. i will add four and then multiply it by five. the answer will be thirty five. whats the number?
kodGreya [7K]

Answer:

B. 3

Step-by-step explanation:

Let's make an equation for this. Our unknown number is x.

x

We are adding 4.

x + 4

Then multiplying by 5.

(x + 4) • 5

It will equal 35.

(x + 4) • 5 = 35

To solve this, divide both sides by 5.

(x + 4) = 7

Now subtract 4 from both sides.

x = 3

This is your answer.

Check this by plugging it back into our original equation.

(x + 4) • 5 = 35

(3 + 4) • 5 = 35

7 • 5 = 35

35 = 35

Your answer is correct.

Hope this helps!

3 0
2 years ago
Help me on this please !
inna [77]

Answer:

24.08

Step-by-step explanation:

We use the Pythagorean theorem and we get (16)^2 + (18)^2 = (x)^2

256 + 324 = x^2

x^2 = 580

x is about 24.08.

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2 years ago
When ∆A′B′C′ is reflected across the line x = -2 to form ∆A″B″C″, vertex (note: please enter your response using apostrophes ins
maria [59]
(A) because it is reflecting over the x-axis.
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3 years ago
Find the standard deviationof 28, 30, 29, 26, 31, and 30.
Alisiya [41]

Answer:

hope that help for you.....

8 0
2 years ago
I need help ASAP with question 3 <br> Worth 40 points
nekit [7.7K]

Answer:The answer is 4

Step-by-step explanation:

The exact answer is 3 1/4, but then you have to round it up to get 4

6 0
2 years ago
Read 2 more answers
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