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Mumz [18]
3 years ago
7

-3(5)^2-(-2)(-8) simplify

Mathematics
1 answer:
avanturin [10]3 years ago
3 0

To do this, we're going to use the order of operations (PEMDAS):

P - Parentheses

E - Exponents

M - Multiplication

D - Division

A - Addition

S - Subtraction

First let's do parentheses, there isn't anythig in parentheses we need to simplify, so we can skip this step.

Next let's look for exponents. I see we have a 5^2 so let's replace that with 5^2=25:

-3(25)-(-2)(-8)

Now let's look for multiplcation. We know that things that are right next to eachother in parentheses represent multiplcation, so let's simply this more:

-3(25)=-75

(-2)(-8)=16

-75-16

And now we're left with a simple problem we know how to solve.

Answer: -91

Hope this helps!

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AnnyKZ [126]

Acceleration is the change in velocity with respect to the time. The acceleration of the car at segment C is -30 meter per second squared. Hence the option B is the correct option.

<h3>Given information-</h3>

Segment A runs from 0 seconds 0 meters per second to 1 seconds 30 meters per second.

Segment B runs to 3 seconds 30 meters per second.

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Segment D runs to 7 seconds 10 meters per second.

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Acceleration is the change in velocity with respect to the time. Acceleration of a vector quantity which means it has both magnitude and the direction. It can be given as,

a=\dfrac{\Delta v}{\Delta t}

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Acceleration at segment C,

a_c=\dfrac{10-40}{6-5}

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Thus the acceleration of the car at segment C is -30 meter per second squared. Hence the option B is the correct option.

Learn more about the acceleration here;

brainly.com/question/2437624

4 0
2 years ago
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Svetlanka [38]

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weeeeeb [17]
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4c + 3b = 81
------------------
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4c + 3b = 81
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Irina18 [472]

8+2(12-5)

here we solve the bracket part first

8+2(7)

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Answer 8+2(12-5)=22

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