Answer :
Answer:
(a) .5(88) + .1(94) = 53.4
(b) .5(88) + .1(94 + 76 + 74) + .2x = 80
44 + .1(244) + .2x = 80
44 + 24.4 + .2x = 80
68.4 + .2x = 80
.2x = 11.6
x = 58
Answer:
(a) .5(88) + .1(94) = 53.4
(b) .5(88) + .1(94 + 76 + 74) + .2x = 80
44 + .1(244) + .2x = 80
44 + 24.4 + .2x = 80
68.4 + .2x = 80
.2x = 11.6
x = 58