The number of combinations of 9 friends taken 4 at a time is given by:
Answer choice a is correct.
Answer:
Equation:
when n = 4
Step-by-step explanation:
Given
Direct Variation: P ∝ n
When n = 15, P = 150
Required
Determine the equation
Her earnings if she sold 4 necklaces
P ∝ n
Convert variation to equation
When P = 150, n = 15 (Substitute these values in the given equation)
Divide both sides by 15
Substitute k = 10 in
------- Equation that relates P and n
When she sold 4 necklaces, n = 4
Substitute n = 4 in the formula above
Answer:
7 3/4
Step-by-step explanation:
7 1/4 + 7 1/2
7 1/2 is 7 2/4
so 1/4 + 2/4 = 3/4
thus getting 7 3/4
Answer:
64.2580645161 words in a minute
Step-by-step explanation:
Hope that helps!