Answer:
D.
Step-by-step explanation:
After the third step, take the square root of both sides.
Third Step:

Thus, the fourth step is:

The left side cancels:

D.
6x + 5y = 7
-6x - 9y = -9
-4y = -2
y = 1/2 or 0.5
2x + 3(1/2) = 3
2x + 1.5 = 3
2x = 1.5
x = 0.75
Answer:
a) x=23/9 or 2 5/9 or 2.5
b) x=5-y
19/42=9 The input is a contradiction it has no solutions.
Answer:
y = 90°
Step-by-step explanation:
- 110° is the measure of exterior angle of bigger triangle.
- -> (x + x) + 70° = 110° (By exterior angle theorem)
- y is the measure of exterior angle of smaller triangle.
- -> y = x + 70° (By exterior angle theorem)