D + q = 40
.10d +.25q= $7.75
d +q = 40
d =40-q
.10(40-q) +.25q= $7.75
4 - .10q + .25q =7.75
4 +.15q =7.75
4-4 +.15q =7.75-4
.15q= 3.75
.15q/.15 = 3.75/.15
q = 25
d =40-25
d = 15
Check
.10(15) +.25(25)= $7.75
1.5+6.25=7.75
7.75=7.75
Answer:3*(7*d)+(4e)=3*7d+4e
Step-by-step explanation:
Answer:
no because they did not multiply the whole numbers and just multiplied the powers
Step-by-step explanation:
Answer:
They aren't
Step-by-step explanation:
9/25 / 3= 3/8.3
3/10 x 3 = 9/30
none of those equal to each other
Answer:
28 dollars
Step-by-step explanation:
$45+$5= $50 which is how much she spent it total
then she sells it for $78
so her profit would be $28
