) Himari is solving the equation 4 (x - 3) = 16. Her first step is 4x - 12 = 16. Which step could be the next step? Select all that apply.
1) 4x -12 + 12 = 16 + 12
2) 4x - 12-(-12) = 16 - (-12)
3) 1/4 • (4x - 12) = 16 • (1/4)
4) 4x/4 - 12 = 16/4
5) 4 • (4x - 12) = 16 • 4

it would be 1 and 2

Step-by-step explanation:

It would be number two because to negatives make a positive like this.

16-(-12) is the same as 16+12 and 12-(-12) is the same as 12+12

4(x-3)=16

4x-12=16

4x=16+12

4x=28

x=7

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