I know this is like my 4th question but this is a part A and B assignment. (6th grade) There are 2 images btw :-)

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction

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.