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3 years ago

Ms. Sears earned $120 in interest over 5 years on money that was invested at 6%. How much was her original investment?

Mathematics

1 answer:

Vera_Pavlovna [14]3 years ago

8 0

Answer:2000

Step-by-step explanation: forgive me if im wrong

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3x+1/10=x-1/7 what is x explain how you got the answer

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3x+1/10=x-1/7 subtract 1/10 from both sides 3x=-1/7-1/10+x subtract x from both sides 2x=-1/7-1/10 add -1/7 and -1/0 1/7=10/70 1/10=7/70 -10/70-7/70=-17/70 2x=-17/70 divide by 2 ro multiply by 1/2 x=-17/140

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The sales tax for an item was $15.60 and it cost $390 before tax. Find the sales tax rate. Write your answer as a percentage.

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15.60 times 100 divided by 390=4%

Step-by-step explanation:

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3 years ago

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3 years ago

Use elimination but HURRY

bija089 [108]

Answer:

The solution of the system is the point (-2,4)

Step-by-step explanation:

we have

$2x-\frac{3}{4}y=-7$ ---> equation A

$x+\frac{1}{2}y=0$ ----> equation B

Solve the system by elimination

Multiply the equation B by -2 both sides

$-2(x+\frac{1}{2}y)=-2(0)$

$-2x-y=0$ ----> equation C

Adds equation A and equation C

$2x-\frac{3}{4}y=-7\\-2x-y=0\\--------\\\\-\frac{3}{4}y-y=-7\\\\-\frac{7}{4}y=-7\\\\y=4$

<em>Find the value of x</em>

substitute the value of y in any equation

$x+\frac{1}{2}(4)=0$

$x+2=0$

$x=-2$

The solution of the system is the point (-2,4)

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3 years ago