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2 years ago

Whats 15-b=4b-5(5-3)

Mathematics

1 answer:

Gala2k [10]2 years ago

5 0

15-b=4b-5(5-3)

Multiply the bracket by -5

(-5)(5)=-25

(-5)(-3)=15

15-b=4b-25+15

15-b=4b-10

Move 15 to the other side

Sign changes from +15 to -15

15-15-b=4b-10-15

-b=4b-25

Move 4b to the other side.

-b-4b=4b-4b-25

-b-4b=-25

-5b=-25

divide both sides by -5

-5b/-5=-25/-5

Answer: b=5

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Anita invested $6000, some at 5% and the rest at 6%. If the yearly income is $337.50, what is the amount invested at each rate?

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Therefore, the amount invested with 6% interest will be (6000-x)

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Multiplying both sides by 100 we get:

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Subtracting both sides by 36000 we get:

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Thus, the amount invested at 5% is $2250

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Step-by-step explanation:

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From above equation,

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As CVy/CVx=(Sy/ybar)*100/(Sx/xbar)*100=(Sy/ybar)/(Sx/xbar).

By putting ybar=10xbar, b=10, CVx=0.1 and CVy=0.2.

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