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Algebra
1) (nC0)(2nCn) - (nC1)(2n-2Cn) + (nC2)(2n-4Cn) .... equals to
Ans: 2^n
2) If a(r) is the co-efficient of X^r in the expansion of (1 + X + X^2)^n, then
a(1) - 2*a(2) + 3*a(3) - ... 2n*a(2n) = ? Ans: -n
3) Find the co-efficient of X^r in the expansion of 1 + (1+X) + (1+X)^2 + ... + (1+X)^n.
4)The greatest integer less than or equal to (2^(1/2) + 1)^6 is
(a) 196 (b) 197 (c) 198 (d) 199
Ans: 2^n
2) If a(r) is the co-efficient of X^r in the expansion of (1 + X + X^2)^n, then
a(1) - 2*a(2) + 3*a(3) - ... 2n*a(2n) = ? Ans: -n
3) Find the co-efficient of X^r in the expansion of 1 + (1+X) + (1+X)^2 + ... + (1+X)^n.
4)The greatest integer less than or equal to (2^(1/2) + 1)^6 is
(a) 196 (b) 197 (c) 198 (d) 199
Algebra
ling puts three loonies in her piggy bank every week . tom puts seven loonies in his piggy bank every week . there is a piggy bank in their kitchen with 33 loonies inside . whose piggy bank is it ? how do you know ?
Algebra
If 5x2=23,6x5=66 and 7x5=79 then 10x7=???
Algebra
X^3/4-7X^1/4=0
X square root 3/4 minus 7x square root 1/4 equals 0
Find the real solutions to the equation
X square root 3/4 minus 7x square root 1/4 equals 0
Find the real solutions to the equation
Algebra
I'm thinking of five distinct integers: a<b<c<d<e. When I sum all possible pairs of these numbers, I get the values 2,3,6,7,9,10,11,13,14,17. What are the original numbers?
Algebra
from the given information, find the equation of the line both in slope-intercept form and standard form then it says the slope contains a negative one half and contains poin negative two comma five how do I do this stuff!!! can you give me an anser and an explanation?
Algebra
what is eighteen x squared minus eighteen x plus four
Algebra
factoring trinomials
Algebra
6=a/2+2
Algebra
A farm supply store carries 50-lb bags of both grain pellets and grain mash for
pig feed.
It can store 600 bags of pig feed. At least twice as many of its customers
prefer the mash to the pellets.
The store buys the pellets for $3.75 per bag and sells them for $6.00.
It buys the mash for $2.50 per bag and sells it for $4.00.
If the store orders no more than $1,400 worth of pig feed, how many bags of mash
should the store order to make the most profit? Need to graph as well.
pig feed.
It can store 600 bags of pig feed. At least twice as many of its customers
prefer the mash to the pellets.
The store buys the pellets for $3.75 per bag and sells them for $6.00.
It buys the mash for $2.50 per bag and sells it for $4.00.
If the store orders no more than $1,400 worth of pig feed, how many bags of mash
should the store order to make the most profit? Need to graph as well.
