SOLUTION: Can you please help me evaluate these two expressions? Thank you.
expression 1 = ₉C₂
expression 2 = ₇₀C₃
Algebra.Com
Question 1081850: Can you please help me evaluate these two expressions? Thank you.
expression 1 = ₉C₂
expression 2 = ₇₀C₃
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!
nCr = n!/((n-r)!*r!) ("Combinations" or ways to arrange objects when order doesn't matter)
where:
n! = n*(n-1)*(n-2)*…*3*2*1 (I leave off the *1 when solving problems, it doesn't change anything)
—
Expression 1:
Because I've seen these before, if I were writing it out, I'd say to myself 9*8 (because 7, 6, …, 2 will cancel from the (9-2)! = 7! part), divided by 2!=2:
—
For expression 2, using the shortcut,
RELATED QUESTIONS
Can you please help me evaluate these two expressions? Thanks!
expression 1 =... (answered by math_helper)
Please show me how to evaluate each expression:
a. 8^2/3
b. (-1)^1/5
c. (-27)^2/3
(answered by lwsshak3)
This one is driving me crazy. Can someone please help.
Use properties of logarithms to... (answered by stanbon)
Can you help me subtract the expression? PLEASE!!
2/5w+10 - 3/2w-4
Thank you!... (answered by rchill)
Please help me evaluate this expression, not just simplify. thank you so much.... (answered by checkley77)
Hello. Can you please help me solve this problem?
Evaluate the expression when c = -3... (answered by bayners123)
Please, help....
Evaluate each expression. Name the property used in each step.
1).... (answered by stanbon)
Hello can you please help me solve this numeric Expression.
((-16-(-2+1))*2)/5
Thank... (answered by Theo,rfer)
Can you help me with the expression please?!
3/x^2+4x+3 - 1/x^-9
THANK... (answered by stanbon)