Answer: 12?
Step-by-step explanation:
The answer would be -81t^2+16
Answer: The first one is A. 16 + 10 +10 +10 +10
The second one is 40 units^2
Step-by-step explanation:
Answer:

Step-by-step explanation:
step 1
Find the value of x
we know that
----> by alternate interior angles
solve for x
Group terms

step 2
Find the measure of angle a
we know that
----> by vertical angles
substitute the value of x

step 3
Find the measure of angle b
we know that
----> by supplementary angles (form a linear pair)
we have

substitute

step 4
Find the measure of angle c
we know that
c=b ----> by vertical angles
we have

therefore

step 5
Find the measure of angle d
we know that
d=b ----> by corresponding angles
we have

therefore

step 6
Find the measure of angle e
we know that
e=a ----> by alternate exterior angles
we have

therefore

step 7
Find the measure of angle f
we know that
f=d ----> by vertical angles
we have

therefore
