3 math problem please show step by step

2 answers:

riadik2000 [5.3K]3 years ago

6 0

Number 1
- Multiply the first one by negative one so the x’s are opposites. (-5x-y=12)
- Simplify them
-5x-y=12
5x-7y=4
-8y=16
y=-2
-Fill in y to one of them to find x (x=-2)

Number 2
-Multiply the bottom one by 4 so it is opposite to the first one (-36x-4y=-120)
-Simplify
-5x+4y=-3
-36x-4y=-120
-41x=-123
x=3
-Fill x into one of the problems to find y (y=3)

Number 3
-Multiply the bottom one by -2 to make it opposite (2x-6y=-20)
-Simplify
-9x+6y=27
2x-6y=-20
-7x=7
x=-1
-Fill into one of the equations to get y (y=3)

babymother [125]3 years ago

4 0

The correct answe to tht wits is my

You might be interested in

Find the volume of each solid. Round to the nearest hundredth. Show your work

dybincka [34]

Answer is 512 cu.ft.
Volume of a cube is length x width x height
So 8 x 8 x 8 = 512

8 0

2 years ago

1.Quick market <br> 2.stop and save

zhannawk [14.2K]

Answer:

Quick Market

Step-by-step explanation:

Quick Market

$1.17 divide 3 = $0.39 per apple

Stop and Save

$2.25 divide 5 = $0.45 per apple.

Therefore you get more at Quick Market

7 0

3 years ago

How to convert percent increase or decrease into a multiplier

ankoles [38]

In case of an increase use this formula
$mutiplier = 1 + \frac{\%}{100}$
So if the percentage of increase of 6%, the multiplier will be
$1 + \frac{6}{100} = 1.06$

In case of a decrease, the formula is mostly the same.
$mutiplier = 1 - \frac{\%}{100}$
So if the percentage of decrease is 6%, the multiplier will be
$1 - \frac{6}{100} = 0.94$