9x+12=5x+4
9x-5x=12-4
4x=8
x=8/4
x=2
9514 1404 393
Answer:
(b) 40°
Step-by-step explanation:
Angle x and the one marked 70° are alternate interior angles, so are congruent. The sum of the two base angles of the isosceles triangle is ...
x° +x° = 70° +70° = 140°
So, the remaining angle 1 in the triangle is ...
180° -140° = 40°
∠1 = 40°
Answer:
Rate of change of y is 
Step-by-step explanation:

Answer:
x=5
Step-by-step explanation:
2x+2-7=5
2x-5=5
2x=10
x=5