On a number line point a is located at coordinate -4 and point l is located at coordinate 8 what is the coordinate of the midpoint of segment al? question 4 options: 0 2 4 6

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17

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