The sum of three numbers is 6. The first, minus the second, plus 3 times the third, is 12. The third, plus 4 times the first, plus the second, is 21. What are the numbers?

a. she will receive a refund of $278.

step-by-step explanation:

where r the answers

step-by-step explanation:

answer: y=0 if that is what u r looking for

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.