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3 years ago

Find the value of x. [ (2x-5) (x+4) = 3x + 30]

Mathematics

1 answer:

Vladimir [108]3 years ago

8 0

Step-by-step explanation:

(2x_5)(x+4)

2x(x+4)_5(x+4)

2x²+8x_5x_20

2x²+3x_20=3x+30

2x²+3x_3x=30+20

2x²=50

√2x²=√50

2x=7.071

2x/2=7.071/2

ans=3.536

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san4es73 [151]

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4 years ago

Jocelyn invested $390 in an account paying an interest rate of 2.7%

Katarina [22]

Answer:

There will be $634.05 in the account.

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.

$390 in an account paying an interest rate of 2.7% compounded daily.

This means that $P = 390, r = 0.027, n = 365$

Assuming no deposits or withdrawals are made, how much money, to the nearest cent, would be in the account after 18 years?

This is A(18). So

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

$A(18) = 390(1 + \frac{0.027}{365})^{365*18}$

$A(18) = 634.05$

There will be $634.05 in the account.

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kolbaska11 [484]

Answer:

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Step-by-step explanation:

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