Answer:
Step-by-step explanation:
expand brackets
7x - 42=-14
add 42 to both sides
7x -42 +42 =-14 + 42
7x= 28
divide 7 to both sides
7x/7=28/7
x=4
Answer:
20
Step-by-step explanation:
"Product" indicates that we need to use multiplication.
The difference of 8 and 3 is 5 because 8-3=5
When we put it all together, it becomes
4(8-3)
4(5)
20
Answer:
8.10 you didn't specify what unit was being used
Answer:
1) Angle AOC + Angle COB = Angle AOB
Angle AOC = X
Angle COB = Y
putting in equation, we get
X + Y = AOB
2) Angle X + Y = AOB (proved above)
AOB = 90° ( given)
Angle X + Angle y = 90°
Angle X is the complement of Y
