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3 years ago

5

3x + 8y = 7 2x - 2y = -10 what is x and y show work please basically show work

1 answer:

Murljashka [212]3 years ago

8 0

Answer:

so I don't know how to to take an image but I can try to explain

so here it goes

you can use either elimination method or the substitution method if you use the elimination method then you will have to either pick between using the X coordinate or the y coordinate I choose the X coordinate so the top equation multiply by 2 and the lower equation x by 3 you will end up with 6 x plus 16 y is equals to 14 and 6 x - 6y is equals to -30 subtract the both equations and end up with 0 + 22 y is equals to 44 hence

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3(5x-2)+12=51 solve the equation

Andre45 [30]

<em><u>Answer: ⇒ x=3</u></em>

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Step-by-step explanation:

First you had to subtract by 12 from both sides of equation.

$3(5x-2)+12-12=51-12$

Simplify.

$3(5x-2)=39$

Then you had to divide by 3 from both sides of equation.

$\frac{3(5x-2)}{3}= \frac{39}{3}$

Simplify.

$5x-2=13$

Add by 2 from both sides of equation.

$5x-2+2=13+2$

Simplify.

$5x=15$

Then you divide by 5 from both sides of equation.

$\frac{5x}{5}= \frac{15}{5}$

Simplify it's should be the right answer.

$x=3$

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Hope this helps!

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Have a great day!

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4 years ago

Jason deposited $280 into a bank account paying 2.5% simple annual interest. At this simple interest rate, about how much would

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Answer:

Jason will have earned $35 in simple interest.

Step-by-step explanation:

Simple interest = Principal *rate *time

S.I = P * r * t

Principal = the amount deposited = $280

rate = 2.5%

time = 5 years

S.I = 280 *2.5% *5

S.I = 7*5

S.I = $35

Therefore, in 5 years, Jason will have earned $35 in simple interest.

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Step-by-step explanation:

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