Jed started recording the temperature when he woke up and continued recording throughout the day. Outside Temperature
Temperature (°C)
24
22
20
18
16
14+
12
10-
8
4
2+
2
9 10
3 4 5 6 7 8
Hours since Recording
How long did the temperature increase and decrease? Move numbers to the blanks to complete the sentences.
The temperature increased for
hours. The temperature decreased for
hours.
1
2.
3
4
un
5
5
6

-7

step-by-step explanation:

x^2 + 18x + 74 = (x + 9)^2 - 81 + 74

= (x + 9)^2 - 7.

so q = -7.

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

its adding 5.5 each time

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