Answer is d (the last one)
-7x + y = 13
Answer:
2(-17-y)/3 -7y = 4
Step-by-step explanation:
Solving the second equation for x, we get ...
3x = -17 -y . . . . subtract y
x = (-17 -y)/3 . . . divide by the x-coefficient
Substituting this for x in the first equation gives ...
2(-17-y)/3 -7y = 4
_____
<em>Comment on this problem</em>
If I were solving this by substitution, I'd substitute for y, not x. That way, fractions could be avoided.
Answer:
z=4.2ft
x=60 º
y=60 º
Step-by-step explanation:
Because the triangle is equilateral, all sides are the same, so z=4.2
Also because it is equilateral, all angles of the triangle equal 60 º.
Use the slope-intercept form to find the slopeand y-intercept.
Slope: 2
Y-Intercept: 9
