Answer:
D
Step-by-step explanation:
You just look at the place values
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62,3756 is the number of feet he ran. Divided by 5280, that is 12.075 miles in 70 minutes. Divide 12.075 by 70 to get the miles per minute(0.1725). Then, multiply by 60 to get 10.35, the answer. Therefore, Sam ran at 10.35 miles per hour.
Great Common Factor, GCF.
We can do the elimination method to find the solution for this problem. The elimination method involves adding the two equations together to get rid of a like term.
x + 2y = 7
+ x - 2y = -1
—————————
2x = 6
Now that we eliminated 2y because they cancel out, we are left with 2x = 6. Divide both sides by 2 in order to get x.
The answer is: x = 3.
Now that we know the numerical value of x, all we have to do is plug x into either system of equation in order to find the numerical value of y.
x + 2y = 7
3 + 2y = 7
2y = 4
y = 2
The solution to the problem is (3, 2).