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3 years ago

Please help with this!!!

Mathematics

1 answer:

EastWind [94]3 years ago

7 0

A. x = -2 and y = -5

check:
x^2 - 9 = 0

B. x = 0 and y = -6

check:
x^2 - 6 = 0

C. x1 = 3, x2 = 5

check:
(x - 3)(x - 5) = 0

D. x1 = 0, x2 = 4

check:
x(x - 4) = 0

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3 years ago

what was the interest rate if your balance on an investment of 857 dollars at the end of six years is 1268.36 dollars

Mumz [18]

<h3>The interest rate is 8 % if your balance on an investment of 857 dollars at the end of six years is 1268.36 dollars</h3>

<em><u>Solution:</u></em>

Given that,

Principal = $ 857

Amount = $ 1268.36

Number of years = 6

Rate of interest = ?

Simple Interest = Amount - principal

Simple Interest = 1268.36 - 857

Simple Interest = 411.36

<em><u>Use the formula,</u></em>

$Simple Interest = \frac{ p \times n \times r}{100}\\\\411.36 = \frac{ 857 \times 6 \times r}{100}\\\\41136 = 5142 \times r\\\\r = \frac{41136}{5142}\\\\r = 8 \%$

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