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qaws [65]
4 years ago
5

If I have 6/4 quarts of paint how many stairs can I paint if 1 stair takes 4/8 quarts

Mathematics
1 answer:
ivolga24 [154]4 years ago
8 0
I think about 1 or 2 stairs
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Write 12 as a percentage of 15.
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Answer:

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2 years ago
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Exponential Equation WITHOUT CALCULATOR
Alborosie
Multiply both sides of the first equation by 2^x:

2^x-2^{-x}=4\implies 2^{2x}-1=4\cdot2^x\implies 2^{2x}-4\cdot2^x-1=0

This is quadratic in 2^x; to make this clear, substitute y=2^x. Then

y^2-4y-1=0\implies y=2\pm\sqrt5

One of these solutions for y is negative. But, if x is real, then y=2^x is always supposed to be positive, so we can throw out the negative root, leaving y=2+\sqrt5.

We actually don't have to solve for x exactly. We can just rewrite the next two equations in terms of y.


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Since y=2+\sqrt5, we get

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7 0
3 years ago
What is 2c+7=21 please help
mylen [45]
Hello there.

<span>Question: What is 2c+7=21 please help

Answer: Solve the equation:
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2c = 14.
Divide both sides by 2:
14/2 = 7
c = 7.

</span>Hope This Helps You!
Good Luck Studying ^-^
4 0
4 years ago
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3 years ago
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Solve for x. <br> x+15.09=-2.57
shtirl [24]
X=-12.52

The reason why is because to get x by itself we have to get rid of 15.09, so we subtract 15.09 from both sides and 2.57-15.09=-12.52

Hope this helps!

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3 years ago
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