All Questions ⁺⁰237827 Questions

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385

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quadratics

Find the constants a and b such that x = -1 and x = 1 are both solutions to the equation ax^2 + bx + 2 = 0.

Guest Dec 22, 2021

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370

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Number Theory

Find 2*5 + 8*11 (mod 56)

Express your answer as an integer from 0 to 55, inclusive.

Guest Dec 22, 2021

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311

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Math problem

When a Cray-Ze-Ball is dropped, it bounces to half the height it was dropped from. If a Cray-Ze-Ball is dropped from a height of $6$ feet, how far has it traveled when it touches the ground the $4$th time?

Guest Dec 22, 2021

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363

3

help plz

How many positive integers smaller than 1,000,000 are powers of 2, but are not powers of 4? You may find it useful to consider that 2^10 = 1024.

Guest Dec 22, 2021

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410

3

Coordinates

A line goes through (2, 3) and (−8,2). The line has an x-intercept of P and a y-intercept of Q. Find the area of triangle OPQ

Guest Dec 22, 2021

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385

2

Pls help on this

Both Tom and Sean had an equal amount of savings at first. After Tom gave Sean 1/4 of his savings, Sean had $52 more than Tom. How much savings did both of them have altogether?

Guest Dec 22, 2021

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358

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math problem

The owner of the local Italian restaurant has offered to make a donation of $604 and $5 per diner that night. On the other hand, the owner of the Mexican restaurant has said he could contribute $988 plus $3 per diner. Based on the number of diners who have read more ..

Guest Dec 22, 2021

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415

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Simplify

Simplify the following expression to a simplified fraction:
\[\frac{5/\sqrt{80} + \sqrt{845}/9}{\sqrt{5}}\]

Guest Dec 22, 2021

Dec 21, 2021

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419

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Counting problem

How many integers between 25 and 250 (inclusive) are not perfect cubes nor perfect squares?

Guest Dec 21, 2021

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372

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Math problem

How many distinct positive integers can be represented as the difference of two numbers in the set {1, 3, 5, 7, 9, 11, 13, 15, 17, 19}?

Guest Dec 21, 2021

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420

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Geometry

In triangle ABC, AB = 17, AC = 8, and BC = 20. Let D be the foot of the altitude from C to AB. Find the area of triangle ACD.

Guest Dec 21, 2021

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375

1

Number Theory

Given positive integers x and y such that x not equal to y and 1/x + 1/y = 1/80, what is the smallest possible value for x + y?

Guest Dec 21, 2021

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501

1

Probability

A history class is comprised of 7 female and 5 male students. If the instructor of the class randomly chooses 5 students from the class for an oral exam, what is the probability that 2 female students and 3 male students will be selected? Round your answer read more ..

Guest Dec 21, 2021

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377

1

Coordinates

A line /ell passes through the points B (7,-1) and C(1,7). The equation of this line can be written in the form y=mx+b compute m+b.

Guest Dec 21, 2021

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321

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Probability

Richard and Vanessa are going to play a game of foosball. The first player to score 5 goals wins. Vanessa is better: at any given point she is 80% likely to score the next goal. What is the probability that Richard wins?

Guest Dec 21, 2021

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376

1

help

For real numbers $t,$ the point of intersection of the lines $x + 2y = 7t + 3$ and $x - y = 2t - 2$ is plotted. All the plotted points lie on a line. Find the slope of this line.

Guest Dec 21, 2021

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394

2

Probability

A point P is randomly selected from the square region with vertices at $(\pm 1, \pm 1)$. What is the probability that P is within one unit of the origin? Express your answer as a common fraction in terms of pi.

Guest Dec 21, 2021

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358

1

Coordinates

A line through the points (2, -9) and (j, -17) is parallel to the line 2x + 3y = 21. What is the value of j?

Guest Dec 21, 2021

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317

1

Help!

This was a screenshot, so I just need to type stuff in so it says I have a 'more detailed question'. Please help, this is really hard D:

Guest Dec 21, 2021

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325

1

Coordinates

Three Points on a circle: (-17,-2), (0,15), (9,-2). What is the equation of the circle?

Guest Dec 21, 2021

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374

1

Quadratic

If the polynomial x^2+bx+c has exactly one real root and b=c+7, find the value of the product of all possible values of c.

Guest Dec 21, 2021

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442

2

HALP

Please help, this question is really hard :(

Guest Dec 21, 2021

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419

1

Find . Express your answer as an integer from to , inclusive.

Find 2 * 5^-1 + 8 * 11^-1 (mod 56)
Express your answer as an integer from 0 to 55, inclusive.

Guest Dec 21, 2021

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333

1

Interest

Joseph borrows $10000 from his sister kate at an annual interest rate of 10%. If the interest is compounded annually, how much doe she owe after 12 months?

Guest Dec 21, 2021

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334

1

Probability

Suppose you have a weighted coin in which heads comes up with probability 3/4 and tails 1/4 with probability . If you flip heads, you win 2 but if you flip tails, you lose 2. What is the expected win of a coin flip in dollars?

Guest Dec 21, 2021

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