X − 4y = 7
5x + 9y = 6
5x − 20y = 35 //1st * 5
5x + 9y = 6
5x +9y - 5x + 20y = 6 - 35 //2nd - 1st
5x + 9y = 6
29y=-29
5x=6-9y
y=-1 //1st : 29
5x=6-9*(-1)
y=-1
x=15:5 //2nd : 5
y=-1
x=3
check:
for x=3 and y=-1 there is:
x − 4y = 7 is 3 − 4*(-1) = 7 is 7=7 ok
5x + 9y = 6 is 15-9=6 is 6=6 ok
answer: (3;-1) represents the solution.
Answer:
ax^2+bx=x(ax+b)
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Step-by-step explanation:
If you put 2 points on a graph paper and connect them, you can find the midpoint pretty easily
Answer:
7 rides
Equation 21.50 = 2.50x + 4
Step-by-step explanation:
21.50 - 4 = 17.50
17.50/2.50 = 7
21.50 = 2.50x + 4
x is the amount of rides
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Answer:
Step-by-step explanation: