8x-6y=-20 -16x+7y=30

1 answer:

8 0

Simplifying 8x + -6y = -20

Solving 8x + -6y = -20

Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right

Add '6y' to each side of the equation. 8x + -6y + 6y = -20 + 6y

Combine like terms: -6y + 6y = 0 8x + 0 = -20 + 6y 8x = -20 + 6y

Divide each side by '8'. x = -2.5 + 0.75y

Simplifying x = -2.5 + 0.75y

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your final balance on an investment of 270$ invested at 10% was $459.00, For what period of time did you invest?

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Answer:

n= 5.57 years

Step-by-step explanation:

Giving the following information:

your final balance on an investment of 270$ invested at 10% was $459.00

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A cash register contains only five dollar and ten dollar bills. It contains twice as many five's as ten's and the total amount o

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Answer:

Step-by-step explanation:

Let number of ten dollar bills be x .

So, number of five dollar bills = 2 x

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Amount of money in total cash as a result of ten dollar bills = x × 10 = 10 x dollars

According to question ,

Total amount of money in the cash register = Amount of money in total cash as a result of five dollar bills + Amount of money in total cash as a result of ten dollar bills

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⇒ x = $\frac{620}{20}$ = 31