What are the coordinates of the center of the circle described by the equation x^2+(y+5)^2=16

centre = (0, - 5)

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

x² + (y + 5)² = 16 is in this form

with (h, k) = (0, - 5) ← centre

its a straight line parallel to the time axis

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)