Need help on these 2 for geometry

7. 69° 8. 118°

Step-by-step explanation:

to know

- isosceles triangles have the base angles congruent

- the sum of angles in a triangle is 180

180 -42 = 138 sum of the two base angles

138 /2 = 69 is one base angle

31*2 = 62 are the 2 base angles

180 -62 = 118° vertex angle

(F-32) is negative (because 5/9 of that value is negative.)

F is less than 32. (since 5/9 is positive, whatever we are multiplying it by must be negative. a negative times a positive is a negative)

Step-by-step explanation:

It's NOT the last one, because multiplying anything by zero gives you the result of zero

And it's not the first, because there is one specific answer to this math problem.