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All Questions
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231046 Questions
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309
1
Percent
Grapes are 80% water by weight. When a bushel of grapes dries in the sun for two weeks, it loses 60% of its total weight. All of the weight loss is due to the loss of water. After drying for two weeks, what percentage of the grapes is water by
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Guest
Jul 9, 2022
0
171
1
Algebra
The number a is 5 times as large as b. The sum of a and b is 18. What is the value of the product ab? Express your answer as a common fraction.
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Guest
Jul 9, 2022
0
217
1
Function
The function f(x) has the property that if P and Q are any two distinct points on the graph of y = f (x), then the slope of PQ is equal to 1. What is the value of f(10) - f(0)?
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Guest
Jul 9, 2022
0
207
1
absolute value
If |2x - 1| = x - 2, what is the sum of all possible values of x?
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Guest
Jul 9, 2022
0
139
0
Percent
Brian has earned 65%, 80% and 55% on his three pre-final exams. These exams are not weighed equally: the lowest counts for only 20% of his overall grade, while the other two count for 35% each. If the final exam is the remainder of the overall
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Guest
Jul 9, 2022
0
191
2
Algebra
If sqrt(7 - sqrt(2 + sqrt(n))) = 1, what is the value of n?
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Guest
Jul 9, 2022
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173
1
quadratic
The parabolas defined by the equations y=-x^2-x+1 and y=2x^2-x-1 intersect at points (a,b) and (c,d)$ where c >= a. What is c-a?
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Guest
Jul 9, 2022
0
173
1
Counting
How many integers between 1 and 280, inclusive, are not divisible by 2, 3 or 11?
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Guest
Jul 9, 2022
0
189
2
incircle excircle areas
Let ABC be a triangle with AB = 13, BC = 14, and AC = 15. The incircle
of ABC touches AB and AC at points D and E, respectively. The triangle’s
A−excircle (tangent to segment BC and the extended rays AB and AC, outside ofthe triangle) touches BC at
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Guest
Jul 9, 2022
+6
280
3
+288
Interesting Combinatorics Problem! :D
Source: Mu Alpha Theta
Check their website over here: https://mualphatheta.org/
Evaluate:
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Voldemort
Jul 9, 2022
-1
230
1
voldemort i need the answer
If x and y are positive integers such that 4x + 2y = 36 and 5y + 2x = 58, what is the value of the product xy?
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Guest
Jul 9, 2022
-1
215
2
voldemort solve this problem
Find an ordered pair (u,v) that solves the system
5u = -7 + 2v
3u = 5v - 25
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Guest
Jul 9, 2022
0
124
0
Inequality
Find all x that satisfy the inequality (2x+10)(x+3)<(3x+9)(x+3). Express your answer in interval notation.
Guest
Jul 9, 2022
0
217
1
Probability
A point (x,y) is randomly selected such that 0 <= x <= 3 and 0 <= y <= 6. What is the probability that x + y <= 5? Express your answer as a common fraction.
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Guest
Jul 9, 2022
0
206
2
system
If w, x, y, and z are real numbers satisfying:
w + x + y = -2
w + x + z = 4
w + y + z = 9
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Guest
Jul 9, 2022
0
269
1
geometry
In the figure, triangle ABC is inscribed in a semicircle with diameter AC of length 20 inches, and AB = 10 inches. When the area of the shaded region, in square inches, is expressed in the form a*pi - b what is the value of a + b?
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Guest
Jul 9, 2022
0
225
2
Digits
If n = 10^{2020} + 10^{2019} + 10^{2018} + 10^{2017} + ... + 10^2 + 10^1, what is the sum of digits of the integer n?
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Guest
Jul 9, 2022
0
162
0
math problem
Bertrand has 12 cards: on the front of each card is a digit, and on the back of each card is either a triangle, square, pentagon or circle. Bertrand looks through the pile of cards and says to his friend Georg, "For each card in the pile, if the number
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Guest
Jul 9, 2022
0
302
1
hard question answer asap!!!
The coordinates of the top of a tree are -3,8 , and an acorn is attached to the tree at -1,5 If we know that the acorn lies exactly halfway between a squirrel and the top of the tree, what are the coordinates of the squirrel?
answer
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Guest
Jul 9, 2022
0
182
0
Probability
A positive integer divisor of 11 is chosen at random. What is the probability that this divisor is prime? Express your answer as a common fraction.
Guest
Jul 9, 2022
0
234
0
Counting
Thomas, Carrie and Lenny each captain a different one of three hockey teams. Each captain will choose four players from a pool of 6 players, with each player chosen for only one team. How many different ways can the teams be formed?
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Guest
Jul 9, 2022
0
174
1
Number Theory
What is the greatest integer k such that 80! is divisible by 4^k?
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Guest
Jul 9, 2022
+4
235
2
+50
Double Counting
Since I wasted 2 hours learning double counting I decided to make a problem that has to require double counting
Prove that
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BigBrain
Jul 9, 2022
0
165
1
math problem
If (7^2 + 24^2)*4*(5^2 + 10^2)*5/(75^2 + 100^2) = 5n, what is the value of n?
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Guest
Jul 9, 2022
0
179
1
Number Theory
Find the last 3 digits of 101^{107}.
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Guest
Jul 9, 2022
«
latest
9240
9239
..
8463
8462
8461
8460
8459
..
2
1
»
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