Mula.
2) 4v2 + 8v - 5 = 0

v = 1/2 and v = -5/2

Step-by-step explanation:

4v^2 + 8v -5 =0

Factor it out:

(2v-1)(2v+5)=0

2v-1 = 0

2v = 1

v= 1/2

2v +5 = 0

2v = -5

v = -5/2

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.