All Questions ⁺⁰230662 Questions

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199

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Counting

There are 2 red, 5 green, 3 blue, and 4 white points on a circle. Find the number of line segments which have different vertices of different colors at the given points.

Guest Aug 6, 2021

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321

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help function

Let f be defined by
f(x) = 2 - x if x <= 1
f(x) = 2x - x^2 if x > 1
Calculate f(-3) + f(0) + f(3). read more ..

Guest Aug 6, 2021

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230

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Polynomial

Find the sum of the coefficients in the polynomial 3(3x^{7} + 8x^4 - 7) - 7(x^5 - 7x^2 + 5) + 6(x^3 + x^2) when it is fully simplified.

Guest Aug 6, 2021

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337

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please help

a is chosen from the set {1,2,3,4} and b is chosen from the set {5,6,7,8,9}. what is the probability that the product ab is a prime number

Guest Aug 6, 2021

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335

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help math

Three quarters of the cars in a parking garage are black, 4/7 of the remaining cars are blue, and the rest are silver. If there are 9 silver cars, how many cars are in the parking garage?

Guest Aug 6, 2021

Aug 5, 2021

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309

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help plz

What is the value of 4^{10} * 8^{20} * 16^{30}? Express your answer in the form a^b, where a and b are positive integers such that a is the least possible positive integer.

Guest Aug 5, 2021

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363

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help needed

A horse 24 feet from the center of a merry-go-round makes 32 revolutions. In order to travel the same distance, how many revolutions would a horse 18 feet from the center have to make?

Guest Aug 5, 2021

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312

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help math

It will take 48 hours of work to complete the garden.The garden must be finished in 3 days.
Each gardener works for 6 hours per day.
How many gardeners are needed?

Guest Aug 5, 2021

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329

5

i need some help

A mathematician works for t hours per day and solves p problems per hour, where t and p are positive integers and . One day, the mathematician drinks some coffee and discovers that he can now solve 1

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Guest Aug 5, 2021

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327

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help

Find all complex numbers z such that z^4=-4

Thanks!

Guest Aug 5, 2021

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322

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Proportion

Suppose a is directly proportional to b, but inversely proportional to c. If a = 3 when b = 5 and c =9, then what is c when b=3 and a = 4?

Guest Aug 5, 2021

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301

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Polynomials

Find the constant t such that
(5x^2 - 6x + 7)(4x^2 + tx + 10) = 20x^4 - 9x^3 + 60x^2 - 39x + 70

Guest Aug 5, 2021

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315

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Geometry

What is the area of a triangle with altitudes of length 3, 4, and 5?

Guest Aug 5, 2021

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382

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+313

Math Question

I had a total of 80 pieces of 20¢ coins or 50¢ coins in a box. I used 50% of 20¢ coins and 25% of 50¢ coins to buy a book and had 46 coins left. (a) Find the percentage of the number of 20¢ coins at first. (b) Find the cost of the book.

apsiganocj Aug 5, 2021

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329

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Help function

For complex numbers z, let
f(z) = 2z if z is not real
f(z) = iz if z is real
Find f(i) + f(1) + f(-1) + f(-i). read more ..

Guest Aug 5, 2021

+1

382

1

+313

math

2 boys were telling each other the points they scored in a game.
John : "I lost 48 points and finally has 3/5 of points left."
Peter : "I lost 1/3 of the points and now you has 18 points less than I do."
How many points did John read more ..

apsiganocj Aug 5, 2021

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192

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help counting

Carla has 10 coins, each of which is a nickel, a dime, or a quarter, or a penny. The total value of her coins is less than $1.00. How many different combinations of coins might Carla have?

Guest Aug 5, 2021

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304

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Math Word Problem

Bag A has 10 white towels and 35 blue towels. Bag B has 28 white towels and 40 blue towels. How many white towels and blue towels must be moves from Bag B to Bag A so that 4/5 of the towels in Bag A are blue and 3/4 of the towels in Bag B are white? read more ..

Guest Aug 5, 2021

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325

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Coefficient

Find the coefficient of y^4 in the expansion of (2y-7)^5.

Guest Aug 5, 2021

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221

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Question Please Help!

A locust swarm with 1,000 members has to cannibalize 1% of its own members (rounded up) for each mile the swarm wishes to fly between fields. Every time they land on a field, the swarm increases by 500 members. While the next field is only a mile away, read more ..

Guest Aug 5, 2021

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332

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help algebra

How many gallons of a 25% acid solution should be added with 10 gallons of a 12% acid solution to obtain a 20% acid solution

Guest Aug 5, 2021

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310

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Help please

I have 99 identical square tiles, each with a quarter-circle drawn on it like this:

When I arrange the tiles in a 9x11 rectangular grid, each with a random read more ..

Guest Aug 5, 2021

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245

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geometry

Circle Gamma is the incircle ABC of and is also the circumcircle of XYZ. The point X is on BC, point Y is on AB, and the point is Z on AC. If angle A = 40, angle B = 80, and angle C = 60, what is the measure of angle AYX?

Guest Aug 5, 2021

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211

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Expected Value

1. 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 6 on them. What is the expected value of the number shown when we draw a single slip of paper?

2. Suppose we have a read more ..

Guest Aug 5, 2021

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