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Post New Question
All Questions
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234927 Questions
0
258
1
help with algebra
If a and b are the zeros of the quadratic polynomial f(x) = x^2- 5x + 8 find the value of 1/a+1/b-2ab
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Guest
Oct 9, 2021
0
263
1
Number Theory
The square of a positive integer leaves a remainder of 1 when divided by 5. What are the possible remainders when the integer itself is divided by 5?
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Guest
Oct 9, 2021
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343
1
Number Theory
What is the tens digits of 7^{2011}?
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Guest
Oct 9, 2021
0
351
1
help percent
Our basketball team has finished 80% of its season, during which we won 40% of the games we played. What percent of the remainder of our games must we win in order to finish the season with the same number of wins as losses?
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Guest
Oct 9, 2021
0
371
2
+24
What is Angle B?
D is on side AB of triangle ABC. We know triangle ABC ~ triangle ACD and angle A = 48 degrees. If BC = CD what is angle B
in degrees?
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genericnamealias
Oct 9, 2021
0
554
3
What is the largest prime number in the ten-number list 37,3737,373737,...,37373737373737373737
What is the largest prime number in the ten-number list 37,3737,373737,...,37373737373737373737
Please help
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Guest
Oct 9, 2021
0
343
1
Probability
In a lottery, a ticket costs $3$ dollars, and the jackpot is worth $250000$ dollars. In all, $200000$ tickets are sold, one ticket is randomly drawn, and the winner is awarded the jackpot. What are the expected winnings in dollars of buying one
read more ..
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Guest
Oct 9, 2021
0
575
1
5x-2y=16, 15x-7y=51
Solve the system of equations
5x-2y=16,
15x-7y=51
Enter your answer as the ordered pair (x,y)
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Guest
Oct 9, 2021
0
257
1
Quadratic
Find the smallest value of x such that x^2 + 10x + 25 = 16.
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Guest
Oct 9, 2021
0
223
0
Probability
A point $(x,y)$ is randomly selected such that $0 \leq x \leq 3$ and $0 \leq y \leq 9$. What is the probability that $x + y \leq 5$? Express your answer as a common fraction.
Guest
Oct 9, 2021
-1
1
590
3
+589
FreeWheelin' Skate Shop.
In the FreeWheelin' Skate Shop, exactly 1/4 of the skateboards are red and exactly 2/3 of the scooters are red. If there are equal numbers of red skateboards and red scooters in the shop, what fraction of the total skateboards and scooters together are
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weredumbmaster22
Oct 9, 2021
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330
1
help me someone
How many liters of water should be added to 10 liter of a 20% saline (salt) solution to make a 5% saline solution?
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Guest
Oct 9, 2021
Oct 8, 2021
0
350
2
Calculus
The point P in the figure below has y-coordinate 40/41. Can you help me find Sin(t), cos(t), tan(t), and sec(t) from the unit circle?
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Guest
Oct 8, 2021
+1
1
460
10
+51
Please help! 1 geometry question!
D is on side AB of Triangle ABC. We know triangle ABCtriangle ACD and angle A=48. If BC=BD, what is angle B in degrees?
here is the image:
https://docs.google.com/document/d/1f9ygPhFBH44Ko1mmiGzzfVsAWfiOA3pX50IsnYQ9OBM/edit?usp=sharing
read more ..
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CCeed
Oct 8, 2021
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217
0
Algebra
If a and b are the solutions to the equation x^2 - 5x + 19 = 0, what is the value of (a - 1)(b - 1)?
Guest
Oct 8, 2021
0
253
2
Probability
Ben rolls four fair 10-sided dice. What is the probability that exactly three of the dice show a prime number?
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Guest
Oct 8, 2021
0
251
1
Probability
A drawer contains 3 white balls and 6 black balls. Two balls are drawn out of the box at random. What is the probability that they both are black?
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Guest
Oct 8, 2021
0
362
2
Geometry
In parallelogram ABCD, AB=125cm, AD=132cm, and the length of diagonal AC is 37cm. The area of the parallelogram, in cm2, is
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Guest
Oct 8, 2021
0
215
0
Algebra
Completely factor the following expression:
(6a^3 + 92a^2 - 7) - (-7a^3 + 5a^2 - 7)
Guest
Oct 8, 2021
0
212
0
Algebra
Completely factor the following expression:
(9x^5 + 25x^3 - 4) - (x^5 - 8x^3 - 4)
Guest
Oct 8, 2021
0
203
0
Algebra
If a + b = 7 and a^3 + b^3 = 45, what is the value of the sum 1/a + 1/b? Express your answer as a common fraction.
Guest
Oct 8, 2021
0
1043
2
+216
MAth help pls
Maria has three identical apples and three identical oranges. How many ways are there for her to distribute the fruits among her four friends if she doesn't give Jacky any oranges? (Note: Maria takes none of the fruit herself, and some of her friends might
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Jmaster10
Oct 8, 2021
0
193
0
Sequences
The sum of the terms in an infinite geometric series is 15, and the sum of their squares is 45. Find the first term.
Guest
Oct 8, 2021
0
383
1
Coordinates
What is the product of the coordinates of the midpoint of a line segment with endpoints at (2,3) and (6,8)?
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Guest
Oct 8, 2021
0
219
0
Algebra
Find all values of x such that $\sqrt{4x^2} - \sqrt{x^2} = 8$.
Guest
Oct 8, 2021
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