So we’re looking how many combinations we can make by selecting 5 items in a group of 17.
So we use n C r.
Where I the number of combinations of n objects taken r at a time.
So, 17 C 5
17! / (17-5)! 5! = 6188
(I hope this is correct)
B as if you plug the co-ordinates into the equation and it equals 10: (3x4)-2= 12-2 =10
A doesn't work as the answer is 20
C doesn't work as the answer is 14
D doesn't work as the answer is -20
I believe zero(0)is a rational number
Answer:
a)
Since t is between 0 and 15, and the house was purchased 8 years ago, we have two pairs of values:
- t = 0, V(0) = 42000
- t = 8, V(8) = 67500
<u>Find the slope, m:</u>
- m = (67500 - 42000)/8 = 3187.50
The value of b is 42000, since at t = 0, V = 42000
<u>So the equation is:</u>
b)
The graph is attached.
When V = 72500, t = 9.6 (approximately)
c)
When V = 74000
- 74000 = 3187.5t + 42000
- 3187.5t = 32000
- t = 32000/3187.5
- t ≈ 10 years (rounded down)
d)
When V = 80250
- 80250 = 3187.5t + 42000
- 3187.5t = 80250 - 42000
- 3187.5t = 38250
- t = 38250/3187.5
- t = 12 years
Since you want help i wont tell you the answer..just how to solve...
(need to know) Of in math means multiply
they are giving you something to plug in to f(x) so everywhere in the equation there is an X replace with the equation and solve....in this case they are replacing f(x) with f(a+2) so take 3+x and change it to 3+a+2 and then take x-3 and make it a+2-3.
Then you have 3+a+2 divided by a+2-3
