3 years ago

What is the answer some one help please!!

Mathematics

1 answer:

scoray [572]3 years ago

4 0

The correct answer is B

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John has 5,000 to invest in a saving account that has interest compounded annually. If he wants his money to double in 8 years w

ololo11 [35]

5 000 * X ^(8) = 10 000

x^(8) = 10 000 / 5000

x ^(8)= 2

x = 2^(1/8)

x≈ 1.09

intrest rate must be 9%

7 0

3 years ago

Read 2 more answers

Six times a number increased by 20 is four less than eight times the number. Find the number

DaniilM [7]

Greetings!

"<span>Six times a number increased by 20 is four less than eight times the number. Find the number."...

This would be, as an equation:
</span> $6x+20=8x-4$

Solve:
Add 4 and -6x to both sides.
$(6x+20)+4+(-6x)=(8x-4)+4+(-6x)$
Simplify.
$24=2x$
Divide both sides by 2.
$(24)/2=(2x)/2$
Simplify.
$12=x$
$x=12$
<span>
x=12

Hope this helps.
-Benjamin

</span>

4 0

3 years ago

x squared plus y squared equals 80. My daughter has to work out what x and y are. I have worked it out by trial and error, but k

olya-2409 [2.1K]

you Need to think of 2 square numbers that add up to make 80

answer:

64 + 16

this means that x = 8 and y = 4

because of the square roots

y = 4

and

x = 8