PLEASE SOMEONE HELP solve the equations using substitution method and SHOW YOUR WORK
A. y = 2x + 1
5x + y = 15

B. y = x + 7
4x + 3y = -7

C. y = 1
6x - 8y = 28

D. 2x - 3y = 16
4x + y = 4

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

Triangle knm is what is true about the sides of knm