Answer:
B. 30.526
Step-by-step explanation:
Just subtract.
58.20
-27.674
30.526
You can solve this one by adding their rates, but you have to invert the numbers they give you to find the rate. Rate is measured in something per unit of time, and "per" indicates division. So the rates are: 1/3 of an hour (Sally) and 1/6 of an hour (Steve). So add the rates: 1/3 + 1/6 = 1/2. (1/3 is 2/6, and 2/6 + 1/6 = 3/6). Since their combined rate is 1/2 of a room in one hour, it takes them two hours to paint the room.
This answer makes sense: It takes Sally three hours by herself; with Steve's help, she's faster, but not THAT much faster, because he's pretty slow. You can often spot-check word problem answers like this by giving it a common sense once-over. If we came up with four hours, that would clearly be wrong: it should take her LONGER if she's getting help.
yes it does have enough to cover the cube
Answer:30
Step-by-step explanation: its 30 because you divide 127 1/2 or 127.5 by 4.25 or 4 1/4.
Answer:
Step-by-step explanation:
has to sweep 4/6
already swept 3/6
it needs to sweep 1/6 because
4 / 6-3 / 6 = 1/6
Since they are fractions with the same denominator, you place the same denominator and subtract the numerators.
