Answer:
A e3 x0 +
Step-by-step explanation:
J = 106% . x
S = 106% . (550+x)
O = 106% . 2x
S = 2(212+O) = 106%(550+x)
S = 424 + 2O = 583 + 106%x
2(106%.2x) - 106%x = 583-424
159 = 106%x( 4 - 1 )
159 = 106%x ( 3 )
159 = 318%x
1 = 318%x : 159
1 = 2%x
1 = 2/100 . x
x = 50
Jivesh put $50
Stacy put $600
Oliver put $100
189 because 20.7 rounds to 21 and 9.18 rounds to 9
21 * 9 = 189
Y=2.5r+50
Y is the total points
2.5 is the rate
r is the amount of questions he got right 50 is the score he already earned