All Questions ⁺⁰237643 Questions

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157

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Counting

What do I do here?

Find the number of ways of choosing three points from the grid below, so that they form an isosceles right triangle.

Guest Jan 18, 2023

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159

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Factoring

Can you help with a factoring problem?

We are looking to factor 23x^2 + kx - 5 + x^2 - 3. Some values of k allow us to factor it as a product of linear binomials with integer coefficients. what are all such values of k?

Guest Jan 18, 2023

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184

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Probability

Help I can't get this

My sock drawer contains two red socks, two white socks, and two blue socks. For three days in a row, I pull out two socks out of my sock drawer at random. What is the probability that I get matching read more ..

Guest Jan 18, 2023

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196

2

Please Help!

Can someone help me with this problem?
Thank you in advance!

The sequence is defined by and read more ..

Guest Jan 18, 2023

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191

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Paths

How do I solve this

Find the number of paths from A to I, if each step must be in a right-ward direction. (For example, one possible path is A C D E F G H I)

Guest Jan 18, 2023

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184

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Counting

Really stuck on this!

Marvin the fly starts at (0,0). Each step, Marvin moves one unit right or one unit up. He is trying to get to his home at. However, at there is a frog that will eat him if he goes through that read more ..

Guest Jan 18, 2023

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148

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Counting

Please help with this problem

Find the number of ways of placing 4 balls in 6 boxes if the balls are indistinguishable and the boxes are indistinguishable.

Guest Jan 18, 2023

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163

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Binomial Theorem

How can I use binomial theorem here?

(a) Simplify (n/k)/(n/(k - 1))
read more ..

Guest Jan 18, 2023

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148

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Counting problem

help with this hard question

Find the number of positive integers that satisfy the following conditions:
* Each digit is a 1 or a 2 or a 3 read more ..

Guest Jan 18, 2023

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163

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Algebra

Help, I keep getting the wrong answer.

Let a and b be real numbers such that a^3 + 3ab^2 = 679 and a^3 - 3ab^2 = 673. Find a - b.

Guest Jan 18, 2023

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181

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the quotient of 4 and a number?

the quotient of 4 and a number

Guest Jan 18, 2023

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164

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Graphing question

Need a lot of help here!

The graph of y = f(x) is shown below.
read more ..

Guest Jan 18, 2023

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173

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Sequence

Having trouble getting started with this:

Cai writes down the list of positive integers, excluding squares and cubes and all perfect powers. His sequence starts
2, 3, 5, 6, 7, 10, 11, ...
What is the 100th term in Cai's read more ..

Guest Jan 18, 2023

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163

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Binomial Theorem

How do I use the Binomial Theorem for this?

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 18, 2023

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160

1

math algebra 1 sem 2

Guest Jan 18, 2023

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166

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Arrangements

Help stuck on this

Find the number of ways of arranging the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 in a row so that the product of any two adjacent numbers is even or a mutliple of 3

Guest Jan 18, 2023

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209

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Counting

I need help on this quick

Sam wants to color the three sides of an equilateral triangle. He has two different colors to choose from. In how many different ways can Sam color the sides of the triangle? (Two colorings read more ..

Guest Jan 18, 2023

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182

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Probability

help I'm confused

Valeria has three coins, each of which has a probability of 1/2 of coming up heads. On her first turn, she flips all three coins. If all three come up heads, then she stops. Otherwise, for her second turn, she read more ..

Guest Jan 18, 2023

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154

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Counting question

I can't get the answer to this

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

Guest Jan 18, 2023

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157

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Probability

How do I do 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 18, 2023

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166

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Expected value

I don't know about expected values.

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 18, 2023

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186

2

Find x

Find x in 23^9-23^8=22*23^x

Guest Jan 18, 2023

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158

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Algebra

How do I do this?

Fill in the blanks:
(3 + sqrt(5) + sqrt(2) - 1)^4 = __ + __ sqrt(5) + __ sqrt(2)

Guest Jan 18, 2023

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165

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geometry

What is the answer?

Triangle ABC is a right triangle with angle BAC= 90 degrees and angle B > angle . Suppose AP is an altitude of the triangle, AQ is an angle bisector of the triangle, and AR is a median of the read more ..

Guest Jan 18, 2023

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154

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precacl

I'm supposed to use trig

In the diagram below, what are AC and BC?

Guest Jan 18, 2023

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