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3 years ago

Using the order of operations, what would be the first step: 4−8÷1−3[3+(7−5)2]

Mathematics

1 answer:

jeka943 years ago

3 0

Answer:

(7-5)

Step-by-step explanation:

According to PEMDAS, parenthesis go first. But there are two sets of parenthesis so the one inside the other goes first.

Next would be [3+(2*2)]

Then, [3+4]

Then, -8/1

Then, -3(7)

So the question would be 4-8-21

Which gives you -25 as an answer.

I realize that you weren't asking for the whole thing but maybe there are follow up questions.

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In the triangles,BC is congruent to RS and AC is congruent to TS If RT is greater than BA, which correctly compares angles C and

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3 years ago

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Circle A has a diameter of approximately 20 inches and an area of approximately 300 in2.

Katena32 [7]

Answer:

4. About 2,700 in2

Step-by-step explanation:

The area of a circle ( $A$ ), measured in square inches, is directly proportional to the square of its diameter ( $d$ ), measured in inches. That is:

$A \propto d^{2}$

$A = k\cdot d^{2}$

Where $k$ is the constant of proportionality, dimensionless.

In consequence, the following relationship between circles A and B is obtained:

$\frac{A_{B}}{A_{A}} = \frac{d_{B}^{2}}{d_{A}^{2}}$

The area of the circle B is now cleared:

$A_{B} =\left(\frac{d_{B}}{d_{A}} \right)^{2}\cdot A_{A}$

Given that $d_{A} = 20\,in$ , $d_{B} = 60\,in$ and $A_{A} = 300\,in^{2}$ , then:

$A_{B} = \left(\frac{60\,in}{20\,in} \right)^{2}\cdot (300\,in^{2})$

$A_{B} = 2700\,in^{2}$

Therefore, the correct answer is 4.

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3 years ago

Simplify the fractions below

garri49 [273]

3/4 + 2/3 = 17/12

7/8 - 2/3 = 5/24

3/5 x 1/3 = 1/5

4/7 x 2/3 = 8/21

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Hello, I asked help for this problem several times to no answer. I dont understand it and can use any help. Please, and thank yo

Oduvanchick [21]

Check the picture below.

let's recall that a straight-line has 180°, and that sum of all interior angles in a triangle is also 180°.

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3 years ago

Solve for x. <br> please help real quick

GalinKa [24]

Answer:

(7/2, 0)

Step-by-step explanation:

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