I need help fast and the rite answer please

Colt

Step-by-step explanation:

Solve for x in both cases. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

PEMDAS is the order of operation, and equals:

Parenthesis

Exponents (& roots)

Multiplication

Division

Addition

Subtraction.

Jose:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Add 3.5 to both sides:

5x - 3.5 = 12.5

5x - 3.5 (+3.5) = 12.5 (+3.5)

5x = 16

Next, divide 5 from both sides:

(5x)/5 = (16)/5

x = 16/5

x = 3.2

Colt:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Subtract 3 from both sides:

(x/5) + 3 (-3) = 12 (-3)

x/5 = 12 - 3

x/5 = 9

Next, multiply 5 to both sides:

(x/5)(5) = (9)(5)

x = 9 * 5

x = 45

Colt has the larger solution.

~

1,918

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