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saw5 [17]
3 years ago
9

Please help me its about solving system by substitution

Mathematics
1 answer:
zheka24 [161]3 years ago
5 0

Answer:

heres an example of substitution in a world problem. hope this helps on some other problens

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A total of $12,000 is invested in two corporate bonds that pay 7.5% and 9% simple interest. The invest wants an annual interest
nlexa [21]

Answer:

$13,200

Step-by-step explanation:

You need to use the simple interest formula

I = P * r * t

I = Interest accrued

P = Principal amount invested

r = Interest rate          you need to divide by 100 to get it in decimal form

t = time, in years        if you are given a partial year, divide the months by 12

P = $12,000                                    

r = 7.5% = .075                                    

t = 1                                                  

But, because we want I to equal $990 then I is

I = $990

So we ignore our P and instead solve for the P that will give us the desired result.

I = P * r * t

$990 = P * .075 * 1

$990 = P.075        Divide each side by .075

$990/.075 = P.075/.075

$990/.075 = P

$13,200 = P

So, to earn an annual interest income of $990, $13,200 will have to be invested in the 7.5% bond.

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3 years ago
Arrange the steps to solve this system of linear equations in the correct sequence x+y=-2 2x-3y=-9
balu736 [363]

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Answer:

B and C. can you select more than one?

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