The sum of a triangle is 180 degrees so the value for x would be 9
Answer:
90 miles
Step-by-step explanation:
2 hours = work
speed = x
Distance to work = y
y = 2x
y = 3(x - 15)
3 * x = 3x
3 * -15 = -45
y = 2x
y = 3x - 45
Let's graph this (attached below)
We must find the point at which they intercept.
They intercept at (45, 90)
That means that x = 45 and y = 90
So, she is 90 miles from her office.
Let's check our work:
y = 2(45)
y = 3(45) - 45
y = y
y = 90
2 * 45 = 90
3 * 45 = 135
135 - 45 = 90
This proves that y = y and that y = 90.
Answer:
-2
Step-by-step explanation:
if you have -2, you add 2x on both sides, the x cancel out and you get 10=13, which is wrong. there is no solution.
if you have any other number in the blank, you can bring all of the x to one side easily. if you have -2, you can't do that
The answer is 10 and also rational
The answer is 14 that's it