Solve y: 6.3 = 0.9y Solve x: x + 7.72 = 19 What is y? What is x?

Mathematics

2 answers:

meriva3 years ago

8 0

6.3=0.9y ....6.3/0.9=7.......y=7
x+7.72=19....19 - 7.72= 11.28.......x=11.28

Ulleksa [173]3 years ago

6 0

Solve y: 6.3 = 0.9y
6.3/0.9 = 0.9y/09
y = 7

Solve x: x + 7.72 = 19
x + 7.72-7.72 = 19 - 7.72
x = 11.28

What is y? 7 What is x? 11.28

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find the amount in an account after years if invested$5000 at 6% per year and is compounded quarterly

stich3 [128]

Answer:

The amount of money in the account after t years is given by: $A(t) = 5000(1.015)^{4t}$

Step-by-step explanation:

Compound interest:

The compound interest formula is given by:

$A(t) = P(1 + \frac{r}{n})^{nt}$

Where A(t) is the amount of money after t years, P is the principal(the initial sum of money), r is the interest rate(as a decimal value), n is the number of times that interest is compounded per year and t is the time in years for which the money is invested or borrowed.

Invested $5000 at 6% per year and is compounded quarterly

This means, respectively, that $P = 5000, r = 0.06, n = 4$