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Post New Question
All Questions
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230858 Questions
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1174
1
percents
A tank holds 100 gallons of a thoroughly mixed solution which is $50\%$ alcohol. Twenty-five gallons are drained from the tank and replaced with a solution that is $20\%$ alcohol. The solution in the tank is thoroughly mixed. This procedure is repeated
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Guest
Dec 2, 2018
0
789
5
+845
A curve has equation π¦ = 1 π₯ + 4π₯ .
A curve has equation π¦ = 1/π₯ + 4π₯ .
The point P(-1, -5) lies on the curve. Find an equation of the Normal to the curve at point P.
i used dy/dx to get -x^-2 +4
then i subbed in -1 which gets me 3, 3 is the gradient
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ElectricPavlov
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YEEEEEET
Dec 2, 2018
0
534
1
Pneumatics
If you had a 1.5 inch diameter cylinder at 60 psi how much force could it exert? Show the formula and all work
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Guest
Dec 2, 2018
0
2464
1
Tracy had a bag of candies, and none of the candies could be broken into pieces. She ate of them and then gave of what remained to her
Tracy had a bag of candies, and none of the candies could be broken into pieces. She ate 1/3 of them and then gave 1/4 of what remained to her friend Rachel. Tracy and her mom then each ate 15 candies from what Tracy had left. Finally, Tracy's brother took
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Rom
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Guest
Dec 2, 2018
0
1842
6
Please help with my geo hw
I need help... I did most of my hw, but these just can't? IDK. but...
Among all fractions $x$ that have a positive integer numerator and denominator and satisfy $$\frac{9}{11} \le x \le \frac{11}{13},$$ which fraction has the smallest denominator?
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Guest
Dec 2, 2018
0
605
1
+845
Prove that (4^π β 1)/3 is always a positive integer for π β β.
Prove that (4^π β 1)/3 is always a positive integer for π β β.
for this question so far i proved n =1 is valid
so 4-1/3 = 1 which is positive
then assume n = k is true
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YEEEEEET
Dec 2, 2018
0
2999
2
math questions help!!!!
Question 1: What is the product of all constants such that the quadratic can be factored in the form , where a and b are integers?
Question 2: Find all values of x such that .
Question
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Guest
Dec 2, 2018
0
800
1
+188
HELP
A 2x2 grid is filled with numbers such that: (1). The product of the numbers in the left column is 1/42 and on the right column is 1/72. (2). The sum of the numbers in the top row is 7/24 and in the bottom row is 16/63. Let the top-left entry be a, the
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Mathgenius
Dec 2, 2018
0
791
2
Help plz
Determine the value of the infinite sum
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Guest
Dec 2, 2018
0
1629
2
Need help immediately! Please
Hakeem subtracted 8 from a number, then multiplied the difference by 5. The result was 20. Write and solve an equation to find the number, x.
a/n *I'm in regular 8th-grade math, we're using envision math. Specifically lesson 2-4,
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Guest
Dec 2, 2018
0
1140
8
Telescoping series
Compute
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Guest
Dec 2, 2018
0
624
1
Find the power required.
Find the power required to raise 4m3 of water per minute a vertical distance of 3m, discharging at a speed of 5ms-1. Take g to be 10ms-2
(1m3 has a mass of 1000kg)
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Guest
Dec 2, 2018
0
874
14
+884
Arc Length!
Hello! Let's say we have an arc, and its measure is 36 degrees. If we know that one side length is 10 units what is the perimeter of the arc?
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ant101
Dec 2, 2018
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588
6
+884
Venn Diagrams
Problem: There are 460 people at my school. 30 percent of the people take Science, whereas 75 percent of the people take math. 65 people who take Science also take math. How many people take both math and science?
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ant101
Dec 2, 2018
0
771
6
+884
Overthinking
Let A be the multiples of 4 between {0-170) and B be the multiples of 6 between {0-170}. How many numbers are in the intersection of A and B.
Isn't the intersection the LCM of 4 and 6, which is 12. so, 170/12?
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ant101
Dec 2, 2018
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895
2
+845
A bird flies from a tree. At time t seconds
A bird flies from a tree. At time t seconds, the birdβs height, y metres, above the horizontal ground is given by π¦ = 1/4π‘^4 β π‘^2 + 5 , 0 β€ π‘ β€ 4
Find the rate of change of height of the bird in metres per second when π‘ = 1
ii) Determine,
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Rom
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YEEEEEET
Dec 2, 2018
0
921
4
+845
The point A lies on the curve with the equation = π₯^1/2 .
The point A lies on the curve with the equation = π₯^1/2 . The tangent to this curve at A is parallel to the line 3π¦ β2π₯ = 1 . Find the equation of this tangent at A.
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YEEEEEET
Dec 2, 2018
0
976
1
+1243
Help!
In the diagram, square ABCD has sides of length 4, and triangle ABE is equilateral. Line segments BE and AC intersect at P. Point Q is on BC so that PQ is perpendicular to BC and PQ=x.
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ElectricPavlov
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Lightning
Dec 2, 2018
0
2289
3
+188
PLEASE help
How many three-digit numbers are multiples of neither 5 nor 7?
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Mathgenius
Dec 2, 2018
0
835
1
+1243
Polygons Area
Fido's leash is tied to a stake at the center of his yard, which is in the shape of a regular hexagon. His leash is exactly long enough to reach the midpoint of each side of his yard. If the fraction of the area of Fido's yard that he is able to reach while
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Rom
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Lightning
Dec 2, 2018
0
989
1
+1243
Not 22.5
What is the degree measure of angle LOQ when polygon LMNOPQ is a regular hexagon?
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Lightning
Dec 2, 2018
+1
1168
1
+586
Counting
For some integers that are not palindromes, like 91, a person can create a palindrome by repeatedly reversing the number and adding the original number to its reverse. For example, 91+19=110 . Then 110+011=121 , which is a palindrome, so 91 takes two steps
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xXxTenTacion
Dec 2, 2018
0
1615
1
help plese
The smaller square in the figure below has a perimeter of $4$ cm, and the larger square has an area of $16$ $\text{cm}^2$. What is the distance from point $A$ to point $B$? Express your answer as a decimal to the nearest tenth.
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ElectricPavlov
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Guest
Dec 2, 2018
-1
859
2
+1252
domain
Find domain and range of
TheXSquaredFactor
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CoolStuffYT
Dec 2, 2018
0
822
2
geom
equation of the line tangent to the circle with center at C(3,1) at point (6,-9)
Alan
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Guest
Dec 2, 2018
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