You have $550 in savings account that earns 3% simple interest each year. How
much interest did he earn in 9 months?
Please help

Hey! so the answer is $750

Step-by-step explanation:

Here is why: $550 is how much money someone already has in their account. After that you have 3% simple interest each year. 3% of 550 is 16.5. Do 16.5x10 and you will get 165. 165 plus the money already in someones account would equal $750.

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the two may have that, even a breakdown is probably offered

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18