Sales tax is:
$62.80* (6/100)= $3.77
$62.80+ $3.77= $66.57
The cost of the skateboard including sales tax is $66.57~
40% helping customers + 13% doing paper work = 53% of his time.
This means 100% - 53% = 47% of his time he is doing other tasks.
6 x 18
7 x 8
6 x 18 = 108
7 x 8 = 56
108 + 56 = 164
A) 81 and 48 have a common factor of 3:
81w+48= 3(27w+16)
b) 10 and 25 have a common factor of 5:
10-25t=5(2-5t)
c) 12, 16 and 8 have common factors of 4:
12a+16b+8=4(3a+4b+2)
Hope this helps :)