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3 years ago

What value will make the equation true -21 - ? = 1and1/2

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

3 0

Answer:

the answer would be -21 - (-22 1/2)= 1 1/2

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A chemist is using 327 milliliters of a solution of acid and water. If 13.1% of the solution is acid, how many milliliters of ac

fgiga [73]

Answer:

42.837 milliliters

Step-by-step explanation:

327 x 0.131 = 42.837

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3 years ago

I need help with this please. :)

jek_recluse [69]

9514 1404 393

Answer:

2x
2
128x +640

Step-by-step explanation:

$\displaystyle\frac{8x^2-4x}{4x-2}=\frac{4x(2x-1)}{2(2x-1)}=\boxed{2x}$

$\displaystyle\frac{8x-4}{x+3}-\frac{12x-20}{2x+6}=\frac{8x-4}{x+3}-\frac{4(3x-5)}{2(x+3)}=\frac{8x-4-2(3x-5)}{x+3}\\\\=\frac{8x-4-6x+10}{x+3}=\frac{2x+6}{x+3}=\frac{2(x+3)}{x+3}=\boxed{2}$

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5 0

3 years ago

Find the product of 51 and -2.5.

yaroslaw [1]

The answer is C because 51×-2=-102 and 51×-0.5=-25.5

So it -102+(-25.5) or C

6 0

3 years ago

Read 2 more answers

Andrew fish tank holds 144 gallons of water. To clean the tank, he drains the water at a rate the water at a rate of 6 gallons p

Kobotan [32]

Answer:

8 minutes

Step-by-step explanation:

Since the level of the tank needs to be at two-thirds its original level, then this means that Andrew needs to drain only one-third of the fish tank. Therefore the amount of time it would take can easily be solved with this 2-step equation...

6t = 144 * $\frac{1}{3}$ .... first multiply the right side of the equation

6t = 48 ... next divide both sides by 6

t = 8

Finally, we can see that it will take Andrew 8 minutes to drain the tank to two-thirds of its original level.

4 0

3 years ago

Please help this is due and i only got the second part done

Ainat [17]

Answer:2n+13=75 n=31

8 0

3 years ago