Answer:
A B B C
Step-by-step explanation:
Answer:
(95/31, -118/31)
Step-by-step explanation:
-7x-8y=9
4x+9y=-22
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4(-7x-8y)=4(9)
7(4x+9y)=7(-22)
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-28x-32y=36
28x+63y=-154
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31y=-118
y=-118/31
-7x-8(-118/31)=9
-7x+944/31=9
-7x=9-944/31
-7x=279/31-944/31
-7x=-665/31
7x=665/31
x=(665/31)/7
x=(665/31)(1/7)
x=665/217=95/31
x=95/31, y=-118/31
Answer:
x-intercept: -1/7
y-intercept: 1/4
Step-by-step explanation:
change equation into standard form: 7x - 4y = -1
set 'x' to zero and solve for y: 0 - 4y = -1
y = 1/4
set 'y' to zero and solve for x: 7x - 0 = -1
x = -1/7
From information given, we know
208 miles was at rate of 65 mph. so divide total mileage by speed to get time spent.
208 ÷ 65 = 3.2 hours
So the rest of the trip took 6 - 3.2 = 2.8hours to travel another 348 total miles minus the 208 miles driven at 65mph is 140 miles.
140 miles divided by 2.8 hours gives speed
140 ÷ 2.8 = 50 miles per hour
