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2 years ago

Match each simplified fraction on the left with an equivalent rate on the right.

Mathematics

1 answer:

Alik [6]2 years ago

4 0

Answer:

2/65 = 4 teachers for 130

3/100 = 9 teachers for 300

2/55 = 8 teachers for 220

3/85 = 6 teachers for 170

Step-by-step explanation:

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Use the equation below to find y, if m =6, x = 3, and b = 5.<br><br> y = mx + b

Troyanec [42]

The answer is y = 24

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3 years ago

1) Solve the system by elimination?

lesya692 [45]

Answer:

1) (-6,-9)

times the top equation buy -4 so you cancel out the y

so it be -8x+4y=12 no cancel out the y's

so it be -8x=12 and 5x=6

now combined like terms to get -3x= 36

x = -6 now go plug that back in one of the equations to get y

y = -9

2) (-2,-5)

now on this one you going to substitute y= (2x-1) for y in the otheir eqaution

so it look like 3x-(2x-1)=-1

do your combining of like terms and your division & you get x = -2

now plug x in to y=2x-1 to get y = -5

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2 years ago

A raindrops has a mass of 0.50g. how many moles of water does a raindrop contain

alina1380 [7]

So, here you have to look at the periodic table and see what the molar mass of each molecule composing the water compound $H_2 O$
its two hydrogen atom plus an oxygen molecule, making it about 18g per mol.

That said, looking at the mass, we have to ask ourselves, if a mol of water contains 18g of mass, how many moles do we have in 0.5g of water?
We just do a cross multiplication:
$\frac{(0.5)}{18} =0.027 mol$

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3 years ago

3/7 of a number is 15,what is the number

tatyana61 [14]

Answer:

The answer is 35

Step-by-step explanation:

If you do 15 divided by 3/7 you herb 35 you can check it by doing 3/7 of 35 and you get 15

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2 years ago

You bought 0.40 lb of spinach for $2.38. how much did the spinach cost per pound?δz

coldgirl [10]

$2.38/0.40 lb = $5.95/1 lb
The spinach cost $5.95 per pound.

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2 years ago