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Monicaamm12983
28.07.2019 •
Mathematics
Which ordered pair is the best estimate for the solution of the system of equations? y=−2.5x+6.5 y=x+1
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Ответ:
Explanation:
The second given equation is:
y = x + 1 > I
The first given equation is:
y = -2.5 x + 6.5 > II
Substitute with I in II and solve for x as follows:
y = -2.5 x + 6.5
x + 1 = -2.5 x + 6.5
x + 2.5 x = 6.5 - 1
3.5 x = 5.5
x = 11/7
Now, substitute with x in equation I to get y as follows:
y = x + 1
y = 11/7 + 1
y = 18/7
Hope this helps :)
Ответ:
187.5+162=349.5 miles
150 minutes is 2 and a half hours you would multiply 2.5 and 75
then you would multiply 81 by 2 then finally add both of the answers together