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3 years ago

10

Please help me understand how to do this

2 answers:

MrRa [10]3 years ago

6 0

Whenever you have something to the negative power, it will result in a fraction. So, if you have seven to the second power, it would be 49, and then you turn that into a fraction, which would be 1/49.

CaHeK987 [17]3 years ago

4 0

Answer:

D

Step-by-step explanation:

Since the exponent 2 is negative, you will need to make it positive first. In order to do so, you can put 7^2 in the denominator. (If the original question was 1/7^-2 you could put 7^2 in the numerator to cancel out the negative). By doing this, the negative is removed and you are able to answer the question as 1/7^2 . The answer would then be D, since 7^2 is 49, but you put the number in the denominator because of the negative exponent.

I hope this makes sense!

(also: I am not exactly positive as to what standard form would be with just one number and an exponent, so I answered this as I have learned in my math classes.)

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Here ratio of diameters = 1 : 2 : 3 , so

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3 years ago

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2 years ago

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3 years ago

Solve for k 4.5+1.5k=18−3k

sertanlavr [38]

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{k = 3}}}}}$

Step-by-step explanation:

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Collect like terms

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Subtract 4.5 from 18

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Hope I helped!

Best regards! :D

5 0

2 years ago

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Luna mixes 3/4 of orange juice and 3/8 of cranberry juice and then she gave mags 5/8 cup of juice and we have to turn it into an

Gennadij [26K]

Answer: 1/2

Step-by-step explanation:

The question is for us to calculate the amount of juice that's left.

We are told that Luna mixes 3/4 of orange juice and 3/8 of cranberry juice. The amount of juice mixed will be:

= 3/4 + 3/8

= 6/8 + 3/8

= 9/8

= 1 1/8

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= 1 1/8 - 5/8

= 4/8

= 1/2

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8 0

2 years ago