Answer:
600
Step-by-step explanation:
6 tens = 60 So... 10 times 60= 600
Answer:
A= .75 B= .75
Step-by-step explanation:
Plug in .75. 5(.75) + 3(.75) = 6
7(.75) + 9(.75) = 12
You would turn a to x and b to y to get ---> 5x + 3y = 6 and 7x + 9y = 12 -----> then you would multiply the first equation ^^^^^ by 3 to cancel to give you 15x + 9y = 18 (I did that to get 9y and cancel out the 9y in the other equation) next do 15x + 9y = 18 - 7x + 9y = 12 to get ----> 8x = 6 ---> divide by 8 to get ---> x = .75
Hope this helped!!
Answer:
9 hours
Step-by-step explanation:
12 times 3 is 40 so 3 times 3 is 9
