GUYS PLS HELP!!
all i need to know is what x is please

Option C

Step-by-step explanation:

Area of the composite figure = Sum of the areas of three rectangles given

                                                = (3x)(x) + 4x + 3(3x)

                                                = 3x² + 4x + 9x

                                                = 3x² + 13x

Since, area of the figure = 82

Therefore, expression representing area of the figure is,

3x² + 13x = 82

Option (C) will be the answer.

Here, x is a variable.

And we can get the value of x by using quadratic formula.

deez nu tz

step-by-step explanation:

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