Register
Login
Username
Password
Login
forgot your password?
Home
Forum
+0
Formulary
Maths
Help
Complex Numbers
Integral Calculus
Differential Calculus
Equations
Graphs
Linear Algebra
Number theory
Percent
Standard Functions
Statistics
Trigonometry
Unit Conversion
Units
About
Imprint
Privacy Policy
Terms of Service
Credits
Google+
Facebook
Contact Email
Post New Question
All Questions
+0
230906 Questions
0
187
0
Coordinates
The equation of a straight line AC is 2y=-3x+6. Given the point A(-2,6) and AB:BC = 1:5. Find the equation of straight line that passes through point B and perpendicular to line AC.
Guest
Aug 8, 2021
Aug 7, 2021
0
192
0
help number theory
Suppose that x, y, z are positive integers satisfying x <= y <= z, and such that the product of all three numbers is twice their sum plus 2. What is the sum of all possible values of z?
Guest
Aug 7, 2021
0
388
3
help with geometry
In the diagram below, AM = BM = CM and angle BMC + angle A = 201 degrees. Find angle B in degrees.
●
●
●
Guest
Aug 7, 2021
0
303
1
Counting
At my office, 16 people own cats, 11 people own dogs, and 7 people own both cats and dogs. How many people own a cat or a dog?
(Remember that in mathematics, the word "or" is used in the inclusive sense. So if you own both a cat and a dog, then you are
read more ..
●
Guest
Aug 7, 2021
0
236
1
help solve
One ordered pair (a,b) satisfies the two equations ab^4 = 384 and ab^5 = 4608. What is the value of a in this ordered pair?
●
Guest
Aug 7, 2021
0
166
0
plz help
Let C be the circle with equation x^2+2y-9=-y^2+28x+19. If (a,b) is the center of C and r is its radius, what is the value of a+b+r?
Guest
Aug 7, 2021
0
407
1
Geometry
In trapezoid PQRS, Base PQ is parallel to base RS. Let point X be the intersection of diagonals PR and QS. The area of triangle PQX is 20 and the area of triangle RSX is 48. Find the area of trapezoid PQRS
●
Guest
Aug 7, 2021
0
299
1
help word problem
Tickets to the soft ball game are 4 dollars for students and 7 dollars for adults. if 795 dollars was made at the last game and 165 people attended,how many students were at the game?
●
Guest
Aug 7, 2021
0
345
1
System
find the value of k for which the system of equations has a unique solution 2x+ky-9=0 , kx+3y-13=0.
●
Guest
Aug 7, 2021
0
353
1
Algebra
If one zero of the polynomial 3x^2 + 12x - k is reciprocal of the other , then find the value of k.
●
Guest
Aug 7, 2021
0
383
0
A group of people were asked what form of exercise they participate in.
A group of people were asked what form of exercise they participate in. They were asked whether they walk, run, both walk and run, or neither walk nor run.
The table shows the probabilities of the results.
read more ..
Guest
Aug 7, 2021
0
339
1
Solve the inequality 2x - 5 <= -x + 12. Give your answer as an interval.
Solve the inequality 2x - 5 <= -x + 12. Give your answer as an interval.
●
Guest
Aug 7, 2021
+1
715
2
A used-car lot has 120 vehicles for sale. A sample of 15 of these vehicles finds that 6 of them have previously been in an accident.
A used-car lot has 120 vehicles for sale. A sample of 15 of these vehicles finds that 6 of them have previously been in an accident.
What is the best estimate of the percent of the used-car lot's vehicles that have previously been in an accident?
read more ..
●
●
Guest
Aug 7, 2021
0
301
1
percent
A mixture is 25% red paint, 30% yellow paint, and 45%water. If 4 quarts of red paint are added to 20 quarts of the mixture, what is the percentage of red paint in the new mixture?
●
Guest
Aug 7, 2021
0
315
1
graphing question
Given that the point (9,7) is on the graph of y=f(x), there is one point that must be on the graph of y=f(x^2). What is the sum of coordinates of that point?
●
Guest
Aug 7, 2021
0
441
1
+17
How many positive integers less than 40 are relatively prime to both 7 and 10?
How many positive integers less than 40 are relatively prime to both 7 and 10?
●
Jastun
Aug 7, 2021
0
287
1
help graphing
The graph of y = f(x) is shown in red below. For how many values of c is f(c) = -1?
read more ..
●
Guest
Aug 7, 2021
0
335
1
help quadratic
A ball is thrown from an initial height of 3 meters with an initial upward velocity of 20m/s. The ball's height (in meters) after seconds is given by the following h=3+20t-5t^2. Find all values of for which the ball's height is 13 meters.
●
Guest
Aug 7, 2021
0
255
1
Curved A
Curved A These questions are open ended. Only numbers are expected. The precision (The answer precision (number of decimal places) is indicated for each question. Each question is worth 7 - 10 points. Use the provided information and the dimensions in the
read more ..
●
Guest
Aug 7, 2021
0
240
1
plz help
The sum of the real numbers x and y is 25. Their difference is 18. What is the value of xy ?
●
Guest
Aug 7, 2021
0
472
2
Help math
Four positive integers A, B, C and D have a sum of 36. If A+2 = B-2 = C+2 = D-2, what is the value of the product ABCD?
●
●
Guest
Aug 7, 2021
0
313
1
help inequality
Solve the inequality k^2 - 7k + 12.25 > 0.
●
Guest
Aug 7, 2021
0
341
2
help plz
I pick two whole numbers x and y between 1 and 10 inclusive (not necessarily distinct). My friend picks two numbers x-4 and 2y-1. If the product of my friend's numbers is one greater than the product of my numbers, then what is the product of my numbers?
read more ..
●
●
Guest
Aug 7, 2021
0
453
1
number theory
Find the number in the form x3579x that is divisible by 42.
●
Guest
Aug 7, 2021
«
latest
9235
9234
..
7908
7907
7906
7905
7904
..
2
1
»
Post New Question
2 Online Users
Top Users
+128579
CPhill
moderator
+118608
Melody
moderator
+33616
Alan
moderator
+14929
asinus
moderator
+9589
MaxWong
+3144
admin
administrator
+2440
GingerAle
+1791
tomtom
+1679
wiseowl
+1592
bader
+1145
parmen
Sticky Topics
Some guidelines for question askers.
What is Happening 5
Again a number puzzle. Multiply in writing.
Loads of fun printable number and logic puzzles
¤¤¤¤Welcome To Web2.0calc¤¤¤¤
How to display latex properly
Feature Questions 1 - Started 8th May 19
How to upload a picture.
If a question is ticked that does not mean you cannot continue it.
Should you consider anything before you answer a question?
Geometry Thread
PUZZLES
LaTex Coding
/calculator/bsh9ex1zxj
Historical post!
What is happening? Wrap #4
Great Questions to Learn From 2
Great Answers to Learn From
Reference Material
Information for new people.