Answer: Okay so do 3x7.5 then 3x11.5 then 7.5x11.5 then add it up and you should get 143.25
Let the number be xy ,
xy = 10x + y. when reversed = yx = 10y + x
x = 2y ........(a)
10x + y + 10y + x = 66.........(b)
10(2y) + y + 10y + 2y = 66
20y + y + 10y + 2y = 66
33y = 66
y = 66/33
y = 2
x = 2y = 2*2 = 4
Recall the original number is xy = 42.
Answer:
$17.21
Step-by-step explanation:
Just line up the decimals and then you add. But after you finished adding, make sure you just straight up bring the decimal down to your final answer to the question.
30 x 4 = 120 + 2 x 5 = 10
for 32 hours = $130
30 x 4 = 120 + 5 x 6=30
for 36 hours = $150
30 x 4 = 120 + 5 x 8= 40
for 38 hours =$ 160
30 x 4 = 120 + 5 x 10 =50
for 40 hours = $170
