What is the midpoint of the x-intercepts of f(x) = (x-4)(x+4)

option (a)

step-by-step explanation:

step 1:   take 2 number whose product equal to 25..

and sum of those two number are -10

step: 2 for example here if we take 5,5 are the number,,

5*5=25

and

5+5=10

but we need -10

so if we take   -5,-5

so -5*-5=25

and -5+(-5)=-10

s0

come the equation

replace -10x by these number

like -5x -5x+25

take common

x(x-5)-5(x-5)=0

(x-5)(x-5)=0

answer: i believe it is c

step-by-step explanation:

because 5+4=9 so it would be 3^9

the train arrives at 20: 27 hope i