Two more than 5 times a number is 77

X=15 i think i hope that's what u wanted

 2 + 5n = 77
-2           - 2

5n   =      75
---            ---
5              5
n     =       15

Your equation is 2+5n=77
Your answer is 15

*I hope this helped :) Let me know if you have any questions

B? ? i'm most likely wrong but i think it would be b

Answer

1 number

explanation

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.