The unit rate is another way of saying speed, so we divide the distance over the time. We can pick on any row
If we pick row 1, then, speed = distance/time = 90/2 = 45
Row 2 says the same thing: 135/3 = 45
So does row 3: 225/5 = 45
and so on
Because the speed is 45 mph, the unit rate is 45 miles in one hour. The term "unit" implies how much distance can be covered in one unit of time, in this case 1 hour.
You have the correct answer. Nice work.
In quadrant 2, 
and 
. Use the Pythagorean identity to establish that
Then
Area is length times width. Our length and width are 4 5/8 and 1/2 respectively, so the formula for the area is
. It will be easier to get that mixed fraction into an improper one and then multiply the fractions straight across the top and straight across the bottom.
. Doing that multiplication gives us
, choice B.
Answer:
Step-by-step explanation:
9: y=5(x-1)^2-3
standard form: y=5x^2-10x+2
10: y=3(x+3)^2+2
standard form: y=3x^2+18x+29
