Answer:
7.6525 hours
Step-by-step explanation:
11 / 4 = 2.75 so he spent 2.75 h doing his HW.
and he spent (11/4) x 2.75 practicing piano
(11/4) x 2.75 = 7.6525
The answer is c that is Catalina gross pay
20 + 0.08x = 16 + 0.13x
20 - 16 = 0.13x - 0.08x
4 = 0.05x
x = 80 minutes
20 + 0.08(80) = 16 + 0.13(80)
20 + 6.4 = 16 + 10.4
$26.40
For number nine you divide 7 into 31 and for the second option read for the AWNSER in the comments
36 * 1 = 36
2 * 18 = 36
3 * 12 = 36
4 * 9 = 36
6 * 6 = 36