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2 years ago

Add the equations.3x-y=-5 7x+y=15

Mathematics

1 answer:

Alisiya [41]2 years ago

7 0

Step-by-step explanation:

it is like a regular addition of numbers. you add the different positions.

3x + 7x = 10x

-y + y = 0

-5 + 15 = 10

so, D. is the right answer : 10x = 10

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What is the square root of 430

Sidana [21]

Answer:

√430 or 20.74

Step-by-step explanation:

√430

Prime factorize 430

√2 · 5 · 43

There are no pairs to take out of the root, so the most simplified form of √430 is √430.

If you want the decimal form, it is 20.74

Please mark me Brainliest :)

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3 years ago

What is the following quotient?

alexira [117]

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4 years ago

A one day trip to new york, mary spent $6.25 for breakfast and 8.95 for lunch. She can spend no more than an average of $8.50. H

zysi [14]

Mary spent $10.30 on dinner to stay in budget.

Step-by-step explanation:

Amount spent on breakfast = $6.25

Amount spent on lunch = $8.95

Amount spent on dinner = x

Average = $8.50

Average = $\frac{Sum\ of\ values}{No.\ of\ values}$

$8.50 = \frac{6.25+8.95+x}{3}\\8.50=\frac{15.20+x}{3}$

Multiplying both sides by 3

$8.50*3=\frac{15.20+x}{3}*3\\25.50=15.20+x\\25.50-15.20=x\\x=10.30$

Mary spent $10.30 on dinner to stay in budget.

Keywords: Average, addition

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4 years ago

Use an addition property to solve for b.

Reptile [31]

Answer:

The answer is - 28 plus 16 and 12 together and u get 28 but bc there is a - beside 12 u put that in beside the 28

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4 years ago

What is the difference between a straight angle and a line

Bogdan [553]

A straight angle is 180 degrees in a right angle is 90 degrees

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