Answer:
C. 37.5 minutes
Step-by-step explanation:
You can set up a proportion to help you figure this out.
12/15=30/x (in this proportion, the number of laps are both on the numerator and the time it takes her is on the denomiator.)
Now, just cross multiply and your equations should be: 12·x=15·30, which equals to 12x=450.
Divide 12 on both sides and x=37.5
Answer:
x(2x-5)(x+1)
Step-by-step explanation:
1. First factor out the x of all the numbers to get x( 2x^2 -3x -5)
2. To factor, I used cross multiplying- (Sorry but I don't know how to explain it)
3. You're done!
(Sorry if it isn't amazing)
Explanation:
To mark 2/5; move two parts on the right-side of zero. To mark 11/5; move eleven parts on the right-side of zero. To mark -8/5; move eight parts on the left-side of zero. To mark -3/5; move three parts on the left-side of zero.
Y=2 x=3 double check is at bottom but cut off
