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3 years ago

. The bill at a restaurant is $43.89. How much should he leave for a 20% tip?

Mathematics

1 answer:

Studentka2010 [4]3 years ago

3 0

Answer:

8.778 or 8.8

Step-by-step explanation:

20% of 43.89 is 8.778

math: 43.89*(20/100) = 8.778

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nignag [31]

I is C because you use the pythag theorem

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Some people advise that in very cold weather, you should keep the gas tank in your car more than half full. Irene 's car had 5

madam [21]

Answer:

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3 years ago

If a=2b^3 and b= -1/2c ^-2,express a in terms of c.

ElenaW [278]

Answer:

Part 1) $a=-\frac{1}{4c^6}$

Part 2) $a=-\frac{1}{4c^{-6}}$

Step-by-step explanation:

Part 1) we have

$a=2b^{3}$ ----> equation A

$b=-\frac{1}{2}c^{-2}$ ----> equation B

substitute equation B in equation A

$a=2(-\frac{1}{2}c^{-2})^{3}$

Applying property of exponents

$(x^{m})^{n}=x^{m*n}$

$x^{-m} =\frac{1}{x^{m}}$

$a=2(-\frac{1}{2}c^{-2})^{3}=2(-\frac{1}{2})^3(c^{-2})^{3}=2(-\frac{1}{8})(c^{-6})=-\frac{1}{4c^6}$

therefore

$a=-\frac{1}{4c^6}$

Part 2) we have

$a=2b^{3}$ ----> equation A

$b=-\frac{1}{2c^{-2}}=-\frac{c^{2}}{2}$ ----> equation B

substitute equation B in equation A

$a=2(-\frac{c^{2}}{2})^{3}$

Applying property of exponents

$(x^{m})^{n}=x^{m*n}$

$x^{-m} =\frac{1}{x^{m}}$

$a=2(-\frac{c^{2}}{2})^{3}=2(-\frac{c^{6}}{8})$

simplify

$a=-\frac{c^{6}}{4}$

therefore

$a=-\frac{1}{4c^{-6}}$

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3 years ago

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Maurinko [17]

Answer:

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Step-by-step explanation:

-3(y+2)=21

1st Open parenthesis

-3y-6=21

+6 +6

-3y=27

/-3 /-3

y=-9

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3 years ago

What is 5292cm rounded to the nearest thousandth

dolphi86 [110]

There's no decimal so this doesn't need to be rounded.

If you mean 5.292cm, that's already rounded, as the thousandth place is the third place.

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3 years ago