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2 years ago

What is 25 - (12 - 4) ÷ 0.4

Mathematics

2 answers:

jeka942 years ago

7 0

According to PEMDAS (Parenthesis, Exponents, Multiply, Divide, Add, Subtract):

25 - (12 - 4) ÷ 0.4

25 - 8 ÷ 0.4

25 - 20

Pachacha [2.7K]2 years ago

3 0

Answer:

Step-by-step explanation-

Rewrite the division as a fraction.
$25 - \frac{12 - 4}{0.4}$
Subtract 4 from 12

$25 - \frac{8}{0.4}$
Divide 8 by 0.4

$25 - 1 * 20$
Multiply -1 by 20.

$25 - 20$
Subtract 20 from 25

Answer = 5

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Is student is reading a book about 370 words per minute convert this rate to words per hour

Helen [10]

Answer:
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step-by-step explanation:
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370(60)
22,200

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3 years ago

Read 2 more answers

Suppose a railroad rail is 3 kilometers and it expands on a hot day by 15 centimeters in length. Approximately how many meters w

earnstyle [38]

Answer:

Answer: 13.4 m

Step-by-step explanation:

For small angles, x, in radians,

tan(x) ≈ sin(x) = x

Use this to create an approximate diagram for the problem as shown in the figure below.

The actual deflected shape is parabolic, but it is approximated by an isosceles triangle with small equal angles.

The extend length is 3 km + 12 cm, which is

3000 + 0.12 = 3000.12 m

Half of the extended length is 1500.06 m

Let h+ the rise of the center of the rail above ground.

From the Pythagorean theorem, obtain

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h = 13.4 m, which is about 0.9% of the original length.

Read more on Brainly.com - brainly.com/question/5596356#readmore

6 0

3 years ago

Ten times the sum of half a number and 6 is 8

Genrish500 [490]

" · " - times

" + " - sum

n - a number

0.5n - half a number

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(10)(0.5n) + (10)(6) = 8

5n + 60 = 8 |substract 60 from both sides

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3 years ago

Please help me with this!!

slega [8]

Answer:

The Answer is (1,10)

Step-by-step explanation:

First, I saw the operation done on point (5,8), to translate it to point (3,9), then I did this operation again to get the answer.

[The operation I'm talking about is (x-2,y+1)]

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3 years ago

What is the following quotient?

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Answer:

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Step-by-step explanation:

$\frac{1}{1+\sqrt{3} }$

basically we want to get rid of the √3 on the denominator

to do so we multiply it by itself so it is a perfect square

but whatever we do to the top we must do to the bottom so we multiply the numerator and denominator by √3

$\frac{1*\sqrt{3} }{1+\sqrt{3}*\sqrt{3} }=\frac{\sqrt{3} }{1+\sqrt{9} } =\frac{\sqrt{3} }{1+3} =\frac{\sqrt{3} }{4}$

notes : √3 × √3 = √9 which is a perfect square that simplfies to 3

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2 years ago