53. PHYSIOLOGY Scientists determined that the rate y (in calories per minuta at which you use energy while walking can be modeled by
y = 0.00849(x – 90.2)2 + 51.3, 50 < x < 150
where x is your walking speed (in meters per minute). Graph the function on the
given domain. Describe how energy use changes as walking speed increases.
What speed minimizes energy use? Source: Bioenergetics and Growth

circumference divided by 3.141592654 then timesthe radius twice

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

21

jk it's 20

step-by-step explanation:

the equation of the parallel line would be y = 2x + 9

step-by-step explanation:

to start we need to find the slope of the original line. we can do that by looking at the coefficient of x, which is 2

since the slope of the original line is 2 and parallel lines have the same slope, we know the new line will also have 2 slope. now we can use that along with the point given in point-slope form to get the find equation.

y - y1 = m(x - x1)

y - 5 = 2(x + 2)

y - 5 = 2x + 4

y = 2x + 9