Answer:
Step-by-step explanation:
First you mean: cos2x = (cosx)^2
For A. 2(cosx)^2-1 = 1 - 2(sinx)^2
we have (cosx)^2 + (sinx)^2 = 1, This is an identity
For B. secx cscx(tanx + cotx) = sec2x + csc2x
So the B is an identity.
For C, I do not understand the ?
For D secax is what?
Step-by-step explanation:
Option c shows line segment because it has no arrow marks
Answer:
(5,-8)
Step-by-step explanation:
You would go to the right then down 8
9+2(|4x−3|)=19
2(|4x−3|)+9=19
Add -9 to both sides.
2(|4x−3|)+9+−9=19+−9
2(|4x−3|)=10
Divide both sides by 2.
2(|4x−3|)/2=10/2
|4x−3|=5
Solve Absolute Value.
|4x−3|=5
4x−3=5 or 4x−3=−5
4x−3=5
4x−3+3=5+3(Add 3 to both sides)
4x=8
4x/4=8/4(Divide both sides by 4)
x=2
4x−3=−5
4x−3+3=−5+3(Add 3 to both sides)
4x=−2
4x/4=−2/4(Divide both sides by 4)
x=−1/2
First you would find the total weight of all the 5 fishes that were caught, since 12.3 pounds is the average. You would d this by multiplying 12.3 and 5
(12.3)(5)=61.5 pounds
Then in order to find the pound of the unknown fish, you would find the total of the pounds of the other fishes which is given o you in the table and then subtract it from 61.5 which is the total weight of all 5 fishes.
61.5-46.9=14.6 pounds