If eleven is added to the square of a number, the results is sixty. find all such numbers

x^2 + 11 = 60 {11 is added to the square of a number to get 60}  

x^2 = 49 {subtracted 11 from both sides}

x = 7 or -7 {took square root of both sides}  

the numbers are 7 and -7

step-by-step explanation:

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