Answer:
x= -1
Step-by-step explanation:
First to whats in the parentheses it will look like this
4x-12=-16 now add 12 to both sides
4x=-4 now you want x alone so divide 4 into -4
x=-1
220-360 is equal to 140 degrees is that what you mean
Answer:
it's actually 28+/-√721/7
Step-by-step explanation:
Answer: -30, -10, 15, 20
Step-by-step explanation:
Answer:
8 ft^2
Step-by-step explanation:

area of ABC is:

area of ABC is 18 square ft, then

now you can find h1 and the area for EFG