Question

Q12. Find the sum of additive inverse and multiplicative inverse of 5
Q13. Three angles of a quadrilateral are equal . The fourth angle measures 120°. What is themeasure of each of the equal angels​

Answer 1

Answer:

12. Additive inverse of 5 = -5

Multiplicative inverse= 1/5

Sum = -5 + 1/5

=(-25+1)/5

=-24/5. (Answer)

13. According to the question,

let the three equal angles be 'x'

We know that,

Sum of all angles of quadrilateral=360°

So,

x+x+x+120°=360°

3x+120°=360°

3x=360°-120°

3x=240°

x=240°/3

x= 80°

therefore,the measure of each equal angles is 80°