Answer:
y = -49
Step-by-step explanation:
Start on -7 since it is the y intercept(b). 4/1 is the slope. So from seven you would go up 4 right 1.
Answer: 
Step-by-step explanation:
Given
For figure (i) both triangles are congruent


For figure (ii)
Two triangles WXZ and WZY are congruent

9 a
------ = -----
a 5
a^2 = 45
a = 3<span>√5
</span>
4 b
------ = -----
b 5
b^2 = 20
b = 2√5
answer:
a = 3√5
b = 2√5
hope it helps