C Practice
Find the distance between each pair of points. Round answers to the
nearest hundredth.
1. (4.6). (1.5)
2. (15, 4), (10,10)
3. (-7-2). (11,3)
Find the midpoint of the given points.
4. (7-5), (9.-1)
5. (-8, 4), (3,-4)
6. (-1.8, 1.9), (1.1.2.8)
7. Standardized Test Practice What is the midpoint of the line segment with
endpoints (5, -1) and (-9, 7)?
A (2, -3)
B (-2,3)
C (3,-2)
D -3,2)

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