Write the quadratic equation in standard form for the following equations (7,4); (-2,1); (1,9)

Step-by-step explanation:

We need to write a quadratic equation so we can use standard quadratic equation:

Plug the given points to get three equations.

for (7,4), we plug x=7 and y=4

...(i)

similarly using other two points, we get:

...(ii)

...(iii)

Now we solve those three equations by any method like substitution, or matrices or by any method and get:

Now plug these values into , we get final equation as:

dhhghghghhrhbb it 5

d

step-by-step explanation:

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)