Multiply the second equation by 3, so 4x-y=6 becomes 12x-3y=18.
x + 3y = -5
+ (12x-3y = 18)
______________
13x = 13
So x = 1
Plug x = 1 into any of these, such as 1 + 3y = -5, which becomes 3y = -6, and then y = -2.
x = 1
y = -2
Answer:
the answer is 5 hours.
Step-by-step explanation:
If you graph the system of equations, it will end up with (5,45) and they are asking for the x
Answer:
∠ CFE and ∠ DFE are adjacent angles and are supplementary, sum to 180°
∠ CFE + 152° = 180° ( subtract 152° from both sides )
∠ CFE = 28°
Step-by-step explanation:
The answer is cos70
the angles add up to 180, so 180 - 90 - 20 = 70 degrees.
9 combinations hope it helps
