Answer:
d. (8,-7)
Step-by-step explanation:
First solve for one of the variables, I chose r so there were no fractions. Then plug r into the other equation and solve for s. then plug your solved s value into the equation in which you solved for r to obtain the value of r. (r,s) = (8,-7)
you need to use the before change and after method.
The first and fourth are called extremes and the second and third are called means.
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