Idon't understand this at all! i would greatly appreciate all steps as to how you found the answer included in your explanation! !

Hello from MrBillDoesMath!

Choice C, 14

Discussion:

The question is a bit obtuse bust as I  understand it if we take x = 14 (Choice C). determined by trial and error, then

sqrt(91x) =

sqrt ( 91 * 14) =

sqrt (1274 ) =

sqrt (49 *26) =                    => as sqrt(49) = 7 we can simplify the expression

= 7 sqrt(26)

Thank you,

MrB

1 + (6 / x - 1)

step-by-step explanation:

divide using polynomial division.

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