Answer: (3.5,-2)
Step-by-step explanation:
To solve this problem, all we have to do is plug in y=-2 into either equations from step one to find the coordinate. To make sure we have the right x-coordinate, let's plug in y for both equations.
4x-7y=28 [plug in y=-2]
4x-7(-2)=28 [multiply]
4x+14=28 [subtract both sides by 14]
4x=14 [divide both sides by 4]
x=3.5
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6x-5y=31 [plug in y=-2]
6x-5(-2)=31 [multiply]
6x+10=31 [subtract both sides by 10]
6x=21 [divide both sides by 6]
x=3.5
Now, we know the solution to the system is (3.5,-2).
Minus m-n = 36 so 36 is your answer.
B) If y is the additive identity is 0
The amount of interest is $252. The equations or represent the relation relationship between p, (r), (t) and (i).
Step-by-step explanation:
The formula of simple interest is
Where, principal amount (p), rate of interest (r), period of investment in years (t), and interest earned (i).
The principal amount is $1,400, interest rate of 6% and the time period of 3 years.
The amount of interest is
Therefore the amount of interest is $252.
The equations or represent the relation relationship between p, (r), (t) and (i).
