05/24/16
Calculus Optimization problem
Two nonnegative numbers have a sum of 10. What is the least possible sum of their reciprocals?
The answer is 2/5
05/24/16
If x+y is rational,must x and y be rational?
Must x and y be rational
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05/23/16
X*-x =0 ???
1 * -1 = 0. Why doesnt 1 (-1) times = 0. I do inventory, if i have x product, (x = 1) , and use x product (x=-1) that leaves me with zero product , so x used -x times should equal zero?
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05/22/16
polynomials
Given that x^2+px+q and 3x^2+q have a common factor x-b, where p,q and b are non-zero, show that 3p^2+4q=0.
05/19/16
Express the product of 2x^2+7x-10 and x+5 in standard form.
I don't understand how to put this in standard form.
05/18/16
Logarithm Question
log base 4 of (2X) + log base 4 of (X+7)=2
Do I need to check for extraneous?
Why doesn't the answer -8 work?
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05/18/16
Susan and Mary can rake a lawn together in 2 hours. Susan can do the job alone in 3 hours. How long would it take Mary to rake the lawn alone?
it is a math problem in my algebra one class, please help I don't understand
05/16/16
I have a problem I need help with: can you assist me? The problem is 27^-2/3 over 26^-1/3
my problem
27^-2/3 /27^-1/3 help please
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05/10/16
Write the polar equation in rectangular form.
Write the polar equation r = 5 sin 0 in rectangular form.
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05/04/16
z is jointly proportional to x2 and y2. If z = 279 when x = 4 and y = 6, find z when x = 5 and y = 3.
I need help figure out the math word problems
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05/01/16
The volume of a cube is increasing at a rate of 300 cm3/min at the instant when the edge is 20 cm. Find the rate at which the edge is changing.
The volume of a cube is increasing at a rate of 300 cm3/min at the instant when the edge is 20 cm. Find the rate at which the edge is changing.
04/30/16
interval notation and inequalities
Solve and write the answer in interval notation. x-1/x+2 >2
Please explain the steps you took to get the answer
Thanks!
04/28/16
Solve sin^3x=sinx
I'm having some trouble solving this problem, can someone please explain the steps for me...
04/26/16
If (7, m) is on a circle with center C(-2, 2) and radius 9, what is the value of m?
If (7, m) is on a circle with center C(−2, 2) and radius 9, what is the value of m? the choices are
a.m=2
b.m=-2+√65
c.m=-2
d.m=-2+√2
04/26/16
find the value of b given that the polynomial f(x)=x^3+bx^2-4x-5 when divided by x-3 and has a remainder of -8.
There is no additional details about my question as i dont know what to do and how to start
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04/24/16
A line represented by y = 2x - 3 and a line perpendicular to it intersect at R(2, 1). What is the equation of the perpendicular line?
A line represented by y = 2x − 3 and a line perpendicular to it intersect at R(2, 1). What is the equation of the perpendicular line?
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