The cost of admission to a popular music was $162 for 12 children and 3 adults. The admission $122 for 8 childern and 3 adults in another music concert. For extra credit (10 pts), how much was the admission for each child and adult? Write the equation

Step-by-step explanation:

let the number of children be x

and the number of adults be y

so

12x+3y=1621

and

8x+3y=1222

equating both 1 and 2 we have

12x+3y=1621

8x+3y=1222

subtract 2 from 1 we have

  12x+3y=1621

 - 8x+3y=1222

    4y+0=40

4y=40

y=40/4

y=10

put y=4 in eqn 1 we have

12x+3y=1621

12x+3*10=1621

12x+30=162

12x=162-30

12x=132

x=132/12  

x=11

therefore a child will cost $11 and adult will cost $10

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.