Solve x
Substitute -y+6 for x in 3x-4y=-31
3x-4y=-31
3(-y+6)-4y=-31
Simplify both sides of the equation
-7y + 18 = -31
Add -18 to both sides
-7y+18-18=-31-18
7y= -49
Divide both sides by -7
7y/-7= -49/-7
y= 7
Substitute 7 for y in x = -y+6
x= -y+6
x= -7+6
Simplify both sides of the equation
x= -1
Answer : x= -1 and y = 7
I hope that's help and have a great night !
Answer:
21
Step-by-step explanation:
21
The speed of the Shanghai Maglev train can be calculated by dividing the total distance traveled (2144 miles) by the total time (8 hours), yielding a result of 268 miles per hour.
To answer the question of how many miles the Shanghai Maglev train travels in an hour, you need to understand the concept of speed. Speed is defined as the distance traveled per unit of time. It is usually used in contexts where the direction doesn't matter, like this one.
The Shanghai Maglev train travels 2144 miles in 8 hours. We can find out how much it travels in an hour by dividing the total distance (2144 miles) by the total time (8 hours).
So this would be: 2144 miles ÷ 8 hours = 268 miles/hour.
Therefore, the Shanghai Maglev train travels 268 miles in an hour.
#SPJ11
Answer:
28
Step-by-step explanation: