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Post New Question
All Questions
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230628 Questions
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276
2
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.
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Guest
Dec 22, 2021
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270
1
Number Theory
Find 2*5 + 8*11 (mod 56)
Express your answer as an integer from 0 to 55, inclusive.
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Guest
Dec 22, 2021
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222
1
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?
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Guest
Dec 22, 2021
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262
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.
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Guest
Dec 22, 2021
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312
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
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Guest
Dec 22, 2021
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281
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?
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Guest
Dec 22, 2021
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265
1
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 ..
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Guest
Dec 22, 2021
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314
2
Simplify
Simplify the following expression to a simplified fraction:
\[\frac{5/\sqrt{80} + \sqrt{845}/9}{\sqrt{5}}\]
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Guest
Dec 22, 2021
Dec 21, 2021
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314
4
Counting problem
How many integers between 25 and 250 (inclusive) are not perfect cubes nor perfect squares?
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Guest
Dec 21, 2021
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271
1
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}?
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Guest
Dec 21, 2021
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317
1
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.
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Guest
Dec 21, 2021
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266
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?
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Guest
Dec 21, 2021
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419
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
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Guest
Dec 21, 2021
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290
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.
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Guest
Dec 21, 2021
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223
0
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
0
275
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.
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Guest
Dec 21, 2021
0
314
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.
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Guest
Dec 21, 2021
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258
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?
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Guest
Dec 21, 2021
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225
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:
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Guest
Dec 21, 2021
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230
1
Coordinates
Three Points on a circle: (-17,-2), (0,15), (9,-2). What is the equation of the circle?
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Guest
Dec 21, 2021
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268
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.
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Guest
Dec 21, 2021
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334
2
HALP
Please help, this question is really hard :(
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Guest
Dec 21, 2021
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344
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.
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Guest
Dec 21, 2021
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232
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?
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Guest
Dec 21, 2021
0
234
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?
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Guest
Dec 21, 2021
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