7 1/2 cm.
1.5+2.5+3.5=7.5
Answer:
Solution
(f+g)(x)=f(x)+g(x)
=x
2
+2x+1
(f−g)(x)=f(x)−g(x)
=x
2
−(2x+1)
=x
2
−2x−1
(fg)(x)=f(x).g(x)
=x
2
(2x+1)
=2x
3
+x
2
(
g
f
)(x)=
g(x)
f(x)
(g(x)
=0)
=
2x+1
x
2
(x
=−
2
1
)
Step-by-step explanation:
ƈǟʀʀʏ օռ ʟɛǟʀռɨռɢ
I think A would be correct
Answer:
90 different ways
Step-by-step explanation:
We have a total of 10 members, and we want to find how many groups of 2 members we can have, where the order of each member in the group of 2 is important, so we have a permutation problem.
To solve this problem, we need to calculate a permutation of 10 choose 2.
The formula for a permutation of n choose p is:

So we have:



So there are 90 different ways of choosing a president and a vice-president.
Answer:
8 hours
Steps:
Train 1:
Hours: 1, 2, 3, 4, 5, 6, 7, 8
Miles: 75, 150, 225, 300, 375, 450, 525, 600
Train 2:
Hours: 1, 2, 3, 4, 5, 6, 7, 8
Miles: 0, 0, 100, 200, 300, 400, 500, 600