Ms. Lane made a pan of brownies and had eaten 1/4. She had Mrs. Trinta, Mrs. Ronda and Mrs. Walker over for a social distanced picnic and they ate 2/3 of the leftover brownies. What fraction the entire pan of the brownies did Mrs. Trinta, Mrs. Ronda and Mrs. Walker eat? (Just type the answer with the proper label, no complete sentence needed and be sure to simplify!)

x + 4/7

step-by-step explanation:

use cymath

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places