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Law Incorporation [45]
3 years ago
11

Solve the system by substitution.

Mathematics
2 answers:
Elina [12.6K]3 years ago
5 0
D x= -9
Y=9
Because 4(-9)+45=9
I just put in each one and d got it right.
Evgen [1.6K]3 years ago
4 0
Y = -x
y = 4x + 45

   -x = 4x + 45
<u>- 4x  - 4x         </u>
 <u>-5x</u> = <u>45</u>
  -5     -5
    x = -9
y = 4x + 45
y = 4(-9) + 45
y = -36 + 45
y = 9
(x, y) = (-9, 9)

It is equal to B.
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Step-by-step explanation:

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Pavel [41]
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8 0
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You have decided to invest $1000 in a savings bond that pays 4% interest, compounded semi-annually. What will the bond be worth
Evgen [1.6K]

Answer:

$2191.12

Step-by-step explanation:

We are asked to find the value of a bond after 10 years, if you invest $1000 in a savings bond that pays 4% interest, compounded semi-annually.

FV=C_0\times (1+r)^n, where,

C_0=\text{Initial amount},

r = Rate of return in decimal form.

n = Number of periods.

Since interest is compounded semi-annually, so 'n' will be 2 times 10 that is 20.

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FV=\$1,000\times (1+0.04)^{20}

FV=\$1,000\times (1.04)^{20}

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FV=\$2191.1231430334194

FV\approx \$2191.12

Therefore, the bond would be $2191.12 worth in 10 years.

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