Answer:
30%
Step-by-step explanation:
there are two numbers that fit in the x<=3 category, those being -3 and -5, so you add the two decimals for them (.17 and .13) to get .30 and move the decimal two times to the right to make it in percentage form.
We know that area=0.5*base*height.
Thus, the equation would look like:
127.5=0.5*base*height
That means, 255 = base*height.
We know base is 17
Then, we divide 255 by 17. That gets us the height.
The height equals 15.
We can divide the amount he traveled (640) by the time he traveled (10):
640 / 10 = 64.
So Curtis drove 64 miles per hour.
Check:
64 miles per hour multiplied by 10 hours:
64 * 10 = 640