All Questions ⁺⁰237643 Questions

0

153

0

Counting

Need help to fill in this grid!

Each unit square of the 4 x 4 grid below is to be filled in with the number 1, 2, 3 or 4 so that
* each row contains the numbers 1, 2, 3, and 4 in some order read more ..

Guest Jan 21, 2023

0

156

0

binomial theorem

please help with the use of the binomial theorem

Find the positive integer n such that the expansion of (4x - 7y)^n contains a term of the form cx^2*y.

Guest Jan 21, 2023

+2

193

1

Expected value

Help plz with ev problem

In a sequence of coin flips, a run is a series of consecutive coin flips that are all the same. For example, in the sequence
the red letters form a run. read more ..

Guest Jan 21, 2023

0

179

0

Probability

Help with easy problem

Four points W, X, Y, and Z are chosen at random on a circle. Find the probabiity that WX > YZ.

Guest Jan 21, 2023

0

161

0

Counting

Need help how do you count

(a) Find the number of ways that Magnus can give out 20 identical stickers to 5 of his friends. (Not everyone has to get a sticker.)
read more ..

Guest Jan 21, 2023

0

165

0

Binomial Thm

Plz help quick

For some real number a and some positive integer n, the first few terms in the expansion of (1 + ax)^n are
1 + 10x + 150 x^2 + cx^3 + ... read more ..

Guest Jan 21, 2023

0

193

1

Probability

A bag has 4 marbles, 5 white marbles, and 6 blue marbles. Three marbles are drawn from the bag (without replacement). What is the probability that they are all the same color?

Guest Jan 21, 2023

0

164

0

Counting

Help, this is hard for me.

Syd chooses two different primes, both of which are greater than 10 and multiplies them. The resulting product is less than How many different products could Syd have ended up with? read more ..

Guest Jan 21, 2023

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153

0

Counting

Help please with this

A fair coin is tossed 12 times. How many different sequences of tosses could there have been, if the number of tosses was at least

Guest Jan 21, 2023

0

153

0

Coordinates

Please help the computations are not easy

A median of a triangle is a line segment joining a vertex of a triangle to the midpoint of the opposite side. The three medians of a triangle are drawn below.
read more ..

Guest Jan 21, 2023

0

159

0

Probability

I don't get this

Let PQR be an equilateral triangle, centered at O. A point X is chosen at random inside the triangle. Find the probability that X is closer to O than to any of the sides. (In other read more ..

Guest Jan 21, 2023

0

161

0

Counting problem

Help meeeee

Find the number of ways of placing 4 balls in 5 boxes if the balls are distinguishable and the boxes are distinguishable. read more ..

Guest Jan 21, 2023

0

152

0

counting

Can you help me out here?

Find the number of paths from P to Q, where each step is to the right or up.

Guest Jan 21, 2023

Jan 20, 2023

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166

1

Help

Alex spent $300 of his money on an oven and 2/5 of the remainder on a cupboard. He had 1/2 of his money left in the end.
(a) What fraction of the Alex's money was spent on the cupboard?
(b) How much money did Alex have at first? read more ..

Guest Jan 20, 2023

+20

199

3

+1307

Please help me!

Suppose 5 different integers are randomly chosen from between 20 and 69, inclusive. What is the probability that they each have a different tens digit?

dolphinia Jan 20, 2023

+2

232

2

+25

PLs help asap

Write in the form , where a and b are positive integers:

Guythatneedshelp Jan 20, 2023

0

155

0

Expected value

I have no clue here

Suppose we have a bag with 10 slips of paper in it. Eight slips have a 3 on them and the other two have a 5 on them.
read more ..

Guest Jan 20, 2023

0

163

0

Geometry

Help with this problem please I can't find the angle

In the diagram below, D is a point on segment CE such that segments AD and BE are parellel and point A is not on segment BC. Line segments AD and BC intersect at read more ..

Guest Jan 20, 2023

0

232

2

Another question

What is the positive solution to the equation x = 1/(2 + 1/(x - 3))?

Guest Jan 20, 2023

0

175

1

Counting

Help we haven't learned how to do this

In the olympic women's skating competition, the gold medal goes to first place, silver to second, and bronze to third. If there are skaters, including Americans, in how many ways can the read more ..

Guest Jan 20, 2023

0

223

1

Please help

I've been working on this so long, but I can't get it.

If x^2 + 1/x^2 = 3 and x > 0, what is the value of x - 1/x? Express your answer in simplest radical form.

Guest Jan 20, 2023

0

184

1

Help! Thank you:)

The following points are on the graph of at the times indicated, for some values of and :

Enter in that read more ..

Guest Jan 20, 2023

0

198

1

Expected value

Help I really need help

The grid below is made up of line segments, like the line segment in red.
read more ..

Guest Jan 20, 2023

0

218

1

help

i nnnnneeeeeddddd hhhhheeeeelllllppppp

Guest Jan 20, 2023

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