7.5minutes/1miles
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Here is the answer to Question 13
27 cubic inches
Because you multiply 3x3x3=27
The rule is:
(a^b)^c=a^(b*c)
In this case:
(9^3)^4=9^(3*4)=9^12
and if you wanted it more simplified you could say:
9^12=(3^2)^12=3^(2*12)=3^24
Answer:
- 2/5x=7/20x+1/4
- -3/4=-1/20x-1/2
- -3/4+1/20x=-1/2
Step-by-step explanation:
If you add 3/4 to both sides of the equation, you get ...
... 2/5x = 7/20x + 1/4 . . . . first choice
If you subtract 2/5x from both sides of the equation, you get ...
... -3/4 = -1/20x -1/2 . . . . third choice
If you subtract 7/20x from both sides of the equation, you get ...
... -3/4 +1/20x = -1/2 . . . . last choice
Choices 2 and 4 are erroneous versions of choices 1 and 3, so do not apply.
