Answer:
x=4
Step-by-step explanation:
3(9-8x-4x)+8(3x+4)=11
Subtract 4
x from −
8
x
3
(
9
−
12
x
)
+
8
(
3
x
+
4
)
=
11
Distribute
27
−
36
x
+
24
x
+
32
=
11
Simplify
−
12
x
+
59
=
11
Subtract 59 to both sides
−
12
x
=
−
48
Divide by -12
x=4
Answer:
45n
Step-by-step explanation:
Answer:
198
Step-by-step explanation:
270/15 gives us 18, his miles per gallon. multiply that by 11, and you get 198.
Add the mileage together to find total miles.
Add the hours together.
Divide total miles by total hours.
305 + 190 = 495 miles
5 + 4 = 9 hours.
495 / 9 = 55 miles per hour.
The average speed was 55 miles per hour.
Answer:
x+y+z=2 has no solutions. You can pick an arbitrary value for x4, and use that to calculate values for all the other variables so that all the equations will be satisfied. If you can set x4 to one of an infinity of real values, then you have an infinity of solutions
