Answer:
the last one is 13 weeks.
Step-by-step explanation:
Plug n = 1 into the original formula to get
an = 14 - 9n
a1 = 14 - 9*1
a1 = 5
So the first term is 5
The common difference is -9 as this is the slope in front of the n term. This means each term is going down by 9 each time. Notice the second term is
an = 14-9n
a2 = 14-9*2
a2 = -4
and so on...
To get the nth term, we subtract 9 from the (n-1)st term
That's the same as saying

So all together, the rule is
Final Answer: Choice B
Answer:
(0,-9)
Step-by-step explanation:
2x-y=9 is firsl equation
x=9+y is second equation
put value of x in 1st equation
2(9+y)-y=9
18 +2y-y=9
18+y=9
y=9-18
y=-9
put value of y in st equation
2x-(-9)=9
2x+9=9
x=0
I guess you have to count them?
Answer:
3x + 4
Step-by-step explanation:
First we want to remove the parentheses so
4x + 3 - (x-1)
4x + 3 -x +1 The signs changed because of the negative sign that was distributed in the parentheses
now arrange them
4x - x + 3 + 1
Now solve
4x - x = 3x
3 + 1 = 4
The answer is 3x + 4
Hope this helps :)