Someone help me on 13 please??? And explain it please and thank you !

PR = 22 / or 9x+4 in equation

Step-by-step explanation:

PR is given 14x-6

We can use PQ and QR equations since they equal PR

14x-6=3x+6x+4

14x-6=9x+4

add six to both sides

14x=9x+10

subtract 9x from both sides

5x=10

Divide by 5

x = 2

This step Isn't needed this is to check your answer.

14(2)-6

28-6 = 22

3(2) = 6

6(2)+4 = 16

6 + 16 = 22

It checks out :D

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.

i agree because i see the other persons thinking is clear