Graph y = x + 4?!?!?

place a point at (0, 4) and (-4, 0) and draw a line through them

Step-by-step explanation:

to graph something, place a point at the slope intercepts.

to find the y intercept, set x to 0

y = 0 + 4

y = 4

the y intercept is 4, or (0, 4)

to find the x intercept, set y to 0

0 = x + 4

0 - 4 = x + 4 - 4

0 - 4 = x

-4 = x

the x intercept is -4 or (-4, 0)

answer: f = 32.2m

step-by-step explanation: that is the answer

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