10/17/16

a man of height 1.8m walks away from a 5 m lamppost at a speed of 1.2m/s. find the rate at which his shadow is increasing in length
what type of equation do you use to figure this problem out? 
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09/20/16

There are 1000 lockers numbered 1 through 1000 that are locked. The first student opens all the lockers. The second closes every second locker.
The third changes the state of every locker beginning with locker #3. What determines if a locker changes state?
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08/14/16

How many solutions are there to the following linear system?
How many solutions are there to the following linear system?   y=7x-4 y=7x+5a. 0 c. 2b. 1 d. infinite number
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08/14/16

trigonometry question
Express u^10cos(x)+1w3sin(x) in the form Ccos(x−?).   C= ?=
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08/12/16

Find X and Y - Show working out please
x and y are two numbers each greater than 3,   the highest common factor of x and y is 3, the lowest common multiple of x and y is 36, find x and y
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07/10/16

Since det(AB)=det(A)det(B) for all square nxn matrices A,B, why does det(A^-1) = 1/(det(A)) for all invertible nxn matrices A?
Please provide a detailed explanation, thank you!  
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07/03/16

math problem help
Solve the following system by using any method:   x+2y-3z=-5 2x+5y+z=12 x-4y-3z=-11
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06/24/16

Math help for school
1) A radiator hold 5 gallons . how much of 30 percent antifreeze solution should be drained and replaced with pure water to reduce the solution to 15 percent antifreeze. 2) Gabe a nuclear... more
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06/21/16

confused as to what formula i should use
A committee of six people is formed to investigate connections between business and the education system. It consists of people chosen from 5 students, 8 teachers, 5 Principles, 10 parents, 4... more
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05/22/16

Find the future value of the annuity. Mike deposits $200 at the e nd of each month in an account that pays interest at 7.2% compounded monthly for 20 years.
math problem
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05/07/16

(5x^2)-(2x-3)^2
Question from NY State Regents Algebra I exam, #10. (January 2016)   I am having trouble understanding why the answer is #3.  If anyone can explain it, I would be most appreciative.  
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05/06/16

What's the value of mn^-1?
f(x)=x2+6x-4   If the parabola described above is shifted m units to the right and n units up, the new vertex is (5,-6). What's the value of mn-1?
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05/03/16

Prove that this statement is true?
Use mathematical induction to prove that this statement is true for every positive n integer   2 + 7 + 12 + ... + (5n - 3) = n(5n - 1)/2
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05/03/16

Please help with proof by induction below
let 〈xn〉n=1...∞ be a sequence satisfying xn+1=xn-xn-1 for each n. Prove that ∀ n ∈ N, xn+6=xn by induction
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04/27/16

How many people
How many guest were at thr dinner if every 2 share a bowl of rice evey 3 shared a bowl of broth every four shared a bowl of fowl and 65 bowls were used all together?
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04/26/16

prove the following trigonometric identity
(sin2∅-1)/(tan2) = (1/sin2∅)-1
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04/26/16

How to find cos(a+b) given tan and sin
find cos(a+b) if sin (a)=8/17 where a is in the first quadrant and tan(b)=-7/24 where b is in the 2nd quadrant"
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04/15/16

In trapezoid RSTV, segment RS is parallel to segment VT and segment RW is perpendicular to segment VT.
If RS = 10 in, ST = 12 in, VT = 18 in, and RW = 8 in, find the area of RSTV.
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04/15/16

Which of the following may be true?
If m=121-5k is divisible by 3, which of the following may be true?   I. m is odd II. m is even III. k is divisible by 3
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04/15/16

The length of a rectangle is 99 cm less than four times its width. If the area of the rectangle is 13 cm2?, find the dimensions of the rectangle.
 word problem
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04/07/16

Suppose A is a set and B is a set. Given that |AUB|=50;|A`B|=20 and |B`A|=15, find that |A| and |B|
Suppose A is a set and B is a set. Given that |AυB|=50;|A`B|=20 and |B`A|=15, find |A| and |B|   "`" is the closest symbole I could find for set subtraction.   PLEASE HELP ME!
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03/23/16

The length of each side of a square is 3 in. more than the length of each side of a smaller square.
The sum of the areas of the squares is 185 in squared .
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03/06/16

The area of a table top is 39 square feet, and twice the length is 5 feet shorter than three times the width. Find the perimeter
we  also currently talking about polynomial equations and models
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03/04/16

Find the area
Find the area of the region bounded by the graphs of y = x, y = 4 - 3x, and x = 0.
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02/07/16

Find the speed that results in a braking distance of 75 feet
the braking distance of a car can be modeled by s=s+s^2/20 where d is the distance (in feet) that the car travels before coming to a stop, and s is the speed at which a car is traveling(in miles... more
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