Answer:
f(x)=x/7
Step-by-step explanation:
f(x)=7x
y=7x
x=7y (switch y and x for inverse)
x=7y (isolate y)
x/7=y
The inverse of f(x)=7x is f(x)=x/7
Answer: 70/1001
Step-by-step explanation:
Choosing 4 boys from total of 8 boys is a combination of 8 when 4 is taken at a time:
8C4 = 8!/4!4!
= 70
Since they are all boys, that means we are choosing 0 girl from the 6 girls.
6C0 = 6!/6!0!
= 1
Choosing 4 students from a total of 6+8=14 students is a combination of 14 when 4 people is taken at a time:
14C4 = 14!/10!4!
= 1001
This will give a probability of:
(70 × 1)/1001
= 70/1001
Answer:
Step-by-step explanation:
When you add the left side of the equation, you get 33.2 because 70-30 is 40, 40+2 is 42, 42-9 is 33, 33+0.3 is 33.03, 33.3-0.1 is 33.2.
When you add the right side of the equation, you get 33.2, because they are the same problem but on side has brackets.
Hope this helps you.
Answer:
OK I think you have to do it like that:
500 is 100%. You have to calculate 500 through 60% and the result through 25%.
-4 > x -7
Move the "-7" to the left hand side which will also change the sign
-4 + 7 > x ( "-4 + 7" is the same as "7 - 4")
3 > x OR x < 3 (3 is greater/bigger than x which also means x is smaller/lesser than 3)
They are both incorrect.