move -7 to the right side of the equal sign which becomes +7
x=2+7
7 + 2 is 9
=9
47 degrees
Work:
90+43+x=180
133+x=180
-133 -133
———————
x= 47
Great question! that means bad weather = $$$$. good weather= no $$$
Answer:
Tn = 64-4n
Step-by-step explanation:
The nth term of an AP is expressed as:
Tn = a+(n-1)d
a is the common difference
n is the number of terms
d is the common difference
Given the 6th term a6 = 40
T6 = a+(6-1)d
T6 = a+5d
40 = a+5d ... (1)
Given the 20th term a20 = -16
T20 = a+(20-1)d
T20 = a+19d
-16 = a+19d... (2)
Solving both equation simultaneously
40 = a+5d
-16 = a+19d
Subtracting both equation
40-(-16) = 5d-19d
56 = -14d
d = 56/-14
d = -4
Substituting d = -4 into equation
a+5d = 40
a+5(-4) = 40
a-20 = 40
a = 20+40
a = 60
Given a = 60, d = -4, to get the nth term of the sequence:
Tn = a+(n-1)d
Tn = 60+(n-1)(-4)
Tn = 60+(-4n+4)
Tn = 60-4n+4
Tn = 64-4n
For this case we have the following equation exponentially:
Where,
- <em>A: initial population </em>
- <em>b: growth rate </em>
- <em>t: time in years</em>
Then, replacing values for 32 years we have:
Answer:
the approximate population in 32 years is:
