MATHEMATICS MIDDLE SCHOOL

A local car wash is open 8 hours each day. It uses 1/3 of a container of wax for each car.

Answers

Answer 1

Answer:

Answer:

22.7

Step-by-step explanation:

8*8.5=68

68/3

22.7

ta da

Answer 2

Answer:

Step-by-step explanation:

57iee873jdbfbfburr893883

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2x + 2y = 28
8x - 2y= 22

system of equations

Answers

eliminate one of the variables..

2x + 2y = 28

2x = -2y + 28

8x - 2y= 22

8x = 2y + 22
x = 0.25y + 2.75

combine equations...

-y +14 = 0.25y + 2.75

solve for the variable..

-y - 0.25y = 2.75 - 14
-1.25y = -11.25
y = 9

replace y with 9 in previous equation..

x = -y + 14
x = -9 + 14
x = 5

so y = 9 and x = 5

I hope I did that right good luck!

There are 23 biscuits in a pack. how many biscuits in 148 packets

Answers

3,404 biscuits in 148 packets

i believe that the answer in 3404 in total

23x148=3404

My cousin was interested in reactions that produce carbon dioxide gas. She wondered if there was some way to predict how much gas a reaction would produce. She did a series of seven experiments and measured the amount of carbon dioxide released by each one. Baking soda (spoons) Calcium chloride (spoons) Carbon dioxide (milliliters) 1 1 800 1 2 1600 1 3 1600 2 1 800 2 2 1600 2 3 2400 3 1 800 Based on my cousin’s experimental results,answer these questions. 1. How many mL of gas would be produced if 3 spoons of baking soda reacted with 3 spoons of calcium chloride? 2. How many mL of gas would be produced if 2 spoons of baking soda reacted with 1.5 spoons of calcium chloride? 3. My cousin wanted to produce exactly 2000 mL of carbon dioxide. How much baking soda and calcium chloride should she use?

Answers

Answer:

1.)2240

2.)1173.33334

3) soda = 3, calcium chloride = 2.625

Step-by-step explanation:

Baking soda (spoons)

1 - 1 - 1 - 2 - 2 -2 - 3

Calcium chloride (spoons)

1 - 2 - 3 - 1 - 2 - 3 - 1

Carbon dioxide (milliliters)

800 - 1600 - 1600 - 800 - 1600 - 2400 - 800

Modeling the above using a multiple regression technique:

ŷ = ax1 + bx2 + c

Where ŷ is the predicted value

x1 and x2 are the first and second predictor variable.

ŷ = 106.66667X1 + 640X2 - 0

1.) How many mL of gas would be produced if 3 spoons of baking soda reacted with 3 spoons of calcium chloride?

ŷ = 106.66667(3)+ 640(3) - 0

320.00001 + 1920 - 0 = 2240

2.) How many mL of gas would be produced if 2 spoons of baking soda reacted with 1.5 spoons of calcium chloride?

ŷ = 106.66667(2)+ 640(1.5) - 0

213.33334 + 960 + 0 = 1173.33334

C.) To produce 2000mL of gas

It could be achieves a a number of ways

ŷ = 106.66667X1 + 640X2 - 0

For instance if she opts to use 3 spoons of soda

2000 = 106.66667(3) + 640x2

2000 = 320.00001 + 640x2

2000 - 320 = 640x2

x2 = 1680/640

x2 = 2.625 spoons

Simplify sqrt 8y/sqrt y

Answers

$(√(8y) )/(√(y) )$

Answer:

$2√(2)$

I turned the numerator into an exponent: $2 (3)/(2)$

$\frac{2^{(3)/(2)}√(y)}{√(y)}$

The $√(y)$ will cancel out, leaving $2 (3)/(2)$ .

$2^{(3)/(2)}=2√(2)$

Hope this helps!!!

$( √(8y) )/( √(y) ) = \n$

$\sqrt{ (8y)/(y) } = \n$

$√(8) =$

$\sqrt{ {2}^(2) * 2 } =$

$\sqrt{ {2}^(2) } √(2) =$

$√(4) √(2) =$

$2 √(2)$

Will mark brainliest. The top question is the one I need answers. Please help thank you.

Answers

Answer:

Length 4, width 5 depth 3

Step-by-step explanation:

3 times 4 times 5= 60

also it is the same as #2 which has a width of five and has a volume of 60 lol

i hope this helps u pls give a brainliest and a thx ;)

How to do 200 + 1 and 1/2 x equals 548 - 1 and 2/5 x

Answers

So to do this you have to first calculate the sum subtract, multiply both sides by 10, move the terms, and collect like terms. So X=3460 I believe

Your welcome

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