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3 years ago

Evaluate −12÷18−6 how do I solve this

1 answer:

7 0

Step #1:
Remind yourself of PEMDAS.

The 'MD' part reminds you that you're supposed to
take care of any multiplication or division before you
worry about the 'AS' ... the addition and subtraction.

Step #2:
Look for multiplication or division.

Do you see any ?
I see -12 ÷ 18 and that's - 2/3 .

Step #3:
NOW do the subtraction.

- 2/3 - 6 = - (6 and 2/3) .

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Answer:

3000

Step-by-step explanation:

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2 years ago

A gas pump fills 2^-2 gallon of gasoline per second. how many gallons does the pump fill in one minute?

astraxan [27]

Answer:

The gas pump filling the gallons in 1 minute will be: 15

Step-by-step explanation:

Given that a gas pump fills 2^-2 gallon of gasoline per second.

As there are 60 seconds in 1 minute.

Thus,

Gas pump filling the gallons in 1 minute will be:

$60\:\times 2^{-2}$

$=60\times \frac{1}{2^2}$ ∵ $a^{-b}=\frac{1}{a^b}$

$\mathrm{Multiply\:fractions}:\quad \:a\times \frac{b}{c}=\frac{a\:\times \:b}{c}$

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Therefore, the gas pump filling the gallons in 1 minute will be: 15

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3 years ago

Suppose Burger King has run a major advertising campaign in the hopes of increasing monthly sales. To investigate the effectiven

Alexxandr [17]

Answer:

The right answer is:

a.H0: μd = 0; H1: μd > 0

Step-by-step explanation:

The claim that want to be tested is that the sales were significantly increased after the commercial, indicanting that the advertisement campaign was effective.

This claim is usually expressed in the alternative hypothesis as it has to have enough evidence to prove that it is true.

Then, the alternative hypothesis H1 should state that the difference (sales after - sales before) is higher than 0.

The null hypothesis would state that the difference is not significantly different from 0, or, in other words, that the sales are the same before and after and that the variation is due to pure chance.

Then, the null hypothesis H0 would state that the difference is equal to 0.

The right answer is:

a.H0: μd = 0; H1: μd > 0

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3 years ago

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(x+4,x-2) I think..,,

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