All Questions ⁺⁰237643 Questions

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197

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Complex numbers

Describe all solutions to zw - 3w - 2iw + 4z = 7iw + 5w + 11iz - 13 + 15i
where z and w are complex numbers.

Guest Dec 7, 2022

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222

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quadratic

Let a and b be the roots of the quadratic x^2 - 5x + 3 = 2x^2 - 11x + 14. Find the quadratic whose roots are a^2 and b^2.

Guest Dec 7, 2022

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252

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Please help me on this geometry problem

Hello I'm looking for help on this geometry problem. Please don't tell me the answer, just how you would solve it. This is urgent, so help would be greatly appreciated :D

I don't really know how to apply an image here so here's the read more ..

Guest Dec 7, 2022

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191

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I need help now

Between 2000 and , 2015 the number of twin births in a certain country increased by14 %, to approximately 139,650. About how many twin births were there in 2000?

Guest Dec 7, 2022

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197

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Counting question

Six children are each offered a single scoop of any of 3 flavors of ice cream from the Combinatorial Creamery. In how many ways can each child choose a flavor for their scoop of ice cream so that each flavor of ice cream is selected by at least two children? read more ..

Guest Dec 7, 2022

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203

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Rectangles

Two rectangles overlap, as shown below. Find the area of the overlapping region (which is shaded) if AB = BE = 2 and AD = ED = 4.

Guest Dec 7, 2022

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216

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please help!!! i need awnser by tonight!!!

a pound of blueberries cost 3.98 cents and pumpkins cost 4 dollars each. if i buy 0.25 pounds of blueberries and 2 pumpkins what is the total cost of the fruit? round your answer to the nearest cent.

Guest Dec 7, 2022

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191

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help counting

In a row of five squares, each square is to be colored either red, yellow, or blue, so that no two consecutive squares have the same color, and at lest three of the squares are red. How many ways are there to color the five squares?

Guest Dec 7, 2022

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185

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Probability

Two points on a circle of radius 1 are chosen at random. Find the probability that the distance between the two points is at most 1.5.

Guest Dec 7, 2022

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202

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counting problems

Let n be a positive integer. Let k be a positive integer.

(a) Using a counting argument, show that C(n - 1, k - 1) + C(n - 1, k) = C(n,k).
read more ..

Guest Dec 7, 2022

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172

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im cinfsed

Guest Dec 7, 2022

Dec 6, 2022

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181

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help probability

In Ms. Q's deck of cards, every card is one of four colors (red, green, blue, and yellow), and is labeled with one of seven numbers (1, 2, 3, 4, 5, 6, and 7). Among all the cards of each color, there is exactly one card labeled with each number. The read more ..

Guest Dec 6, 2022

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172

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Pascal's triangle

The entries in a certain row of Pascal's triangle are
1, n, ..., n, 1

The average of the entries in this row is 2. Find n. read more ..

Guest Dec 6, 2022

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160

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6 divided by 3/4?!

Anybody know this?

Guest Dec 6, 2022

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174

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Algebra

Arrange the following numbers in increasing order (smallest first, biggest last):

A = 2*1/2*4*1/6
B = 12*128 read more ..

Guest Dec 6, 2022

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168

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geometry

Let AB be a diameter of a circle, and let C be a point on the circle such that AC=8 and BC=14 The angle bisector of ACB intersects the circle at point M Find CM.

Guest Dec 6, 2022

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155

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What is 10 divided by -2/5

What is 10 divided by -2/5

Guest Dec 6, 2022

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232

2

+660

Pls Help!

Let r and s be the roots of . Find .

Notice: This problem is similar to a previously asked question (https://web2.0calc.com/questions/help-help-asap-please) but the equations are slightly different. I read more ..

Keihaku Dec 6, 2022

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195

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Expected value

In a sequence of a 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.
If a fair coin is flipped two times, what is the expected length of the longest run? read more ..

Guest Dec 6, 2022

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223

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Probability

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 flips any coins that came up tails. read more ..

Guest Dec 6, 2022

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183

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Probability

A standard six-sided die is rolled twice. What is the probability that the product of the rolls is 12?

Guest Dec 6, 2022

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173

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Probability question

A bag contains five white balls and three black balls. Your goal is to draw two white balls.

(a) You simultaneously draw two balls at random. What is the probability that they are both white?
(b) You simultaneously draw two balls read more ..

Guest Dec 6, 2022

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240

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−5(−3k−2m)+8m−3(2m+3k)=

−5(−3k−2m)+8m−3(2m+3k)=

Guest Dec 6, 2022

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164

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help algebra

A magician makes potions by combining maple syrup from a magical maple tree with ordinary water. The magician starts with a large supply of two potions: a red potion, which is 75% magical syrup by volume (and the rest is just water), and blue potion, which read more ..

Guest Dec 6, 2022

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170

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counting

Marvin the fly starts at (0,0). Each step, Marvin moves one unit right or one unit up. He is trying to get his home at (4,6). However, at (2,4) here is a frog that will eat him if he goes through that point. In how many ways read more ..

Guest Dec 6, 2022

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