FIND THE VALUE OF x³=-8
A ±4
B ±2
C-2
D-4

Answers

Answer 1

Answer:

x=-2

Step-by-step explanation:

In this kind of question,we will have to be extra careful to prevent errors or mistake.reason for the errors and mistake is that there is a negative sign in front of the 8...so any solution must ensure to involve the negative sign...or else the final answer will be discarded...

So back to the question

X^3=-8

Which means that the cube of x is 8 and we are to solve for x, therefore to solve this question...we will have to cube root both sides...why

So as to eliminate the cube on x...

Ok how,cube root of x^3 can also be written as x^3×1/3 which gives x

And cube root of -8 will be either 8^1/3 or3√-8

And the answer is-2

To confirm the answer we can say -2×-2×-2=-8

So the final answer is -2

Therefore x=-2

Answer 2

Answer:

Answer:

$C.) \: \: \: - 2$

Step-by-step explanation:

$({ - 2})^(3) = - 8$

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Blockbuster is a store that used to rent videotapes to customers. They charged a $20 membership fee to open a new account. Then, they charged $3 per movie. Your parents had a goft card for $50. How many movies, m could they afford??? What’s the equation plzzz I will give you 100 points

Answers

m=number of movies
the equation would be
20+3m=50
-20. -20
3m=30
3m÷3=30÷3
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so you could rent 10 movies

Hello There,

The answer is:

10 movies

Hope this helps have a great day :)

What is the best rate at which infants grow during the first four years after birth

Answers

Three inches per year.

A bank loaned out $17,500, part of it at the rate of 10% annual interest, and the rest at 14% annual interest. The total interest earned for both loans was $2,170.00. How much was loaned at each rate?$ ______was loaned at 10% and
$______ was loaned at 14%.

Answers

Answer:

$7 000 was loaned at 10 % and

$10 500 was loaned at 14 %

Step-by-step explanation:

Let x = amount loaned at 10 %

Then 17 500 - x = amount loaned at 14 %

0.10x = interest on 10 % loan

0.14(17 500 - x) = interest on 14 % loan

2170.00 = total interest

$\begin{array}{rcl}0.10x + 0.14(17 500 - x) & = & 2170.00\n0.10x + 2450 - 0.14x & = & 2170.00\n2450 - 0.04x & = & 2170.00\n-0.04x & = & -280\n\nx & = & (-280)/(-0.04)\n\nx & = & \mathbf{7000}\n\n\end{array}$

$7000 was loaned at 10 % and

$10 500 was loaned at 14 %

Check:

\ $\begin{array}{rcl}0.10* 7000 + 0.14(17 500 - 7000) & = & 2170\n700 + 0.14(10 500) & = & 2170\n700 + 1470 & = & 2170\n2170 & = & 2170\n\end{array}$

OK.

If 2 pounds of strawberries cost $4.50, how much would 3 pounds cost?

Answers

3 pounds cost $6.75

to help you, turn it into a fraction, 2 punds ove 2.50 equals 3 pounds over X

the correct answer is $ 13.50 because if you do 4.50 times 3 it then equals 13.50

Please I need help on this please

Answers

I don’t know
Ex:I I
Iiiiiii I I I I I I I I I I I I I I I I I I I I did d d d d

A: around 32 to 33 men, using proportions I know that .65 of the people surveyed were men making it 130 men. Out of those 130, .25 like to play sports, so I multiplied 130x.25 to get 32.5 men, however we can’t can’t have half a male right?!

B. If 200 people were surveyed, men and women, .10+.15/ .25 of those people like reading... so I multiplied 200x.25 to get 50. Meaning 50 people like reading.

C. If we know 130 men were surveyed then we’d subtract that amount from 200 which is the overall amount of people to get the amount of women surveyed which is 70.

What is 3/5 times 20