I really need this plz

Step-by-step explanation:

The exterior angle is the sum of the opposite interior angles of the triangle.

Therefore, m<D +m<C = 118°

=> 8y+3 +3y+5 = 118°

=> 11y = 118° - 8°

=> 11 y = 110°

=> y = 10°

m<D = 8y+3

= 8(10)+3 = 83°

m<C= 3(10)+5 = 35°

m<DEC = 180° -118° = 62°

step-by-step explanation:

mean or average is 40.6

we can set up an equation to find the girls' ages. the equation is         28=0.5x-5+x. (comment if you need me to explain how i got this equation.) so, you add x and 0.5x to get 1.5x and add 5 to each side. your new equation is 33=1.5x. now divide both sides of the equation by 1.5 to get 22=x. because x is mary's age, to find jasmine's age we subtract mary's age from 28. we find that mary is 22 years old and jasmine is 6 years old.