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MrRissso [65]
3 years ago
14

Simplify the expression. 7 √x • 7 √x • 7 √x

Mathematics
1 answer:
blsea [12.9K]3 years ago
8 0
Answer:

√7x−49√x

Explanation:

First of all, expand by multiplying √7x⋅√x and √7x⋅7√7respectively:

√7x(√x−7√7)=√7x⋅√x−√7x⋅7√7

... you can express √7x as √7⋅√x...

=√7⋅√x⋅√x−√7⋅√x⋅7⋅√7

=√7⋅(√x)2−(√7)2⋅√x⋅7

... the operations squaring and taking the square root "eliminate each other"...

=√7⋅x−7⋅√x⋅7

=√7x−49√x

Hope that this helped!

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I hope you’re having a good day so far
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Y is inversely proportional to the cube of x if y = 7 when x=4 what is y when x is 5
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Answer:

y = 3.584

Step-by-step explanation:

Given

Variation = Inverse Proportional

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Required

Find y when x = 5

First, we need to represent the variation.

y varies inversely proportional to x³

This implies that

y ~ 1/x³

Convert variation to equation

y = k/x³

Make k the subject

k = x³y

When y = 7, x = 4

This gives:

k = 4³ * 7

k = 64 * 7

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Substitute 5 for x and 448 for k

y = 448/5³

y = 448/125

y = 3.584

6 0
3 years ago
A tree height when planted was 5ft. 8inches. It has grown 14ft. 10 inches how much did it grown
Serjik [45]

Answer:

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So, it grew 9ft. and 2 inches.

3 0
2 years ago
If an animal has four legs, then the animal is a horse.
Annette [7]

This is false.

Step-by-step explanation:

there are a lot of different animals with 4 legs such as a dog, cat ,cow, lion etc.

Hope I helped:)

7 0
3 years ago
Tell whether each sentence about the factors of of 12 is True or False.
Viefleur [7K]

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B. True

C. True

D. False, it makes no sense.

Step-by-step explanation:

Have a nice day

8 0
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