When can you add or subtract equations in a system to solve the system? when do you have to multiply first? Justify your answers with examples.

Answers

Answer 1

Answer: You must always use the order of operations also known as PEMDAS meaning multiplication and division come before adding and subtracting for example when solving 2+2÷2 if not follwing PEMDAS it is 2 When you do it the correct way using PEMDAS it will be 3

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A jeweler needed two diamonds of exactly the same weight to make a ring. The first stone she selected weighed 0.642 carat, the second weighed 0.599 carat, and the third weighed 0.625 carat.By how much did the heaviest stone outweigh the lightest?

0.043 carat
0.042 carat
0.041 carat
0.04 carat

Answers

The answer is 0.043 carat

c is the correct answer

What is this sum about like 3×3 what is that pls tell me

Answers

3x3=9

hope this helps

3x3=9 that's my answer.

100 to the 4th power?

Answers

100,000,000.
You multiply 100 x 100 x 100 x 100, hence to the fourth power means you multiply that number by itself four times, not 100 x 4.

100,100,100 cause you multiply 100×100×100×100

How do you divide 117 into 2.25

Answers

9 x 13 = 117

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2.25 x 4 = 9

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Therefore:

2.25 x 4 x 13 =117

2.25 x 52 = 117

---------------------

Therefore:

117/(2.25) = 52

Therefore:

(2.25)/117 = 1/52

um...you could use long division. if u wanted the answer, then it is 52.
HOPE I HELPED!!!

Number 30 pls
I need help ASAP

Answers

Answer:

y - intercept = - 18

Step-by-step explanation:

To find the y-intercept of the line

y + 4 = - 4 ( x + 3.5 ) ,

We can transpose the equation into the y = mx + b formula where b = y - intercept.

y + 4 = - 4 ( x + 3.5 )

y + 4 = ( - 4x ) + ( - 14 )

y + 4 = - 4x - 14

y = - 4x - 14 - 4

y = - 4x - 18

b = - 18

Therefore:

y - intercept = - 18

45 less than twice the number of n

Answers

n = 15

What are arithmetic operations?

Use one of the four fundamental arithmetic operations to add, subtract, multiply, or divide two or more integers. For challenging computations, we use the PEMDAS approach.

Given five times n is equals to 45 less than twice the number of n.

hence,

5 * n = 2* n + 45

3* n = 45

n = 15

Therefore the value of the n in the given problem is 15.

Learn more about Arithmetic operations here:

brainly.com/question/12278115

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Answer:

45 less than twice a number is 5 times that number

Step-by-step explanation:

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