Yes because two odds make a positive
X = plan A and y = plan B
7x + 9y = 720
5x + 3y = 360.....multiply by -3
---------------
7x + 9y = 720
-15x - 9y = -1080 (result of multiplying by -3)
---------------add
-8x = - 360
x = -360/-8
x = 45 minutes <== plan A
5x + 3y = 360
5(45) + 3y = 360
225 + 3y = 360
3y = 360 - 225
3y = 135
y = 135/3
y = 45 minutes <== plan B
so both plans last 45 minutes <==
Answer:
5x
Step-by-step explanation:
3x + 4x - 2x
7x - 2x
5x
And that's on periodt
Answer:
tell your teacher to help u
Step-by-step explanation:
Answer: it's $550.57
Step-by-step explanation: