# Algebra Homework Help

We’ve answered 320,047 questions. We can answer yours, too.

Filter Questions

» Browse Popular Topics
• Math
The domain asymptote and x-intercept of y = 4 - log(x+5) has to be determined. The graph of the given function is: The domain of the function is all values of x for which y is real and defined....

Asked by reedcapps18 on via web

1 educator answer

• Math
The area of the circle with equation x^2 + y^2 - 8x + 4y = 0 has to be determined. The equation of a circle with center (h, k) and radius r is (x - h)^2 + (y - k)^2 = r^2. Expressing the equation...

Asked by lxsptter on via web

1 educator answer

• Math
`y+4=-4(x-2)` The slope of this line is -4, therefore the slope of the line perpendicular to this is `1/4` . 1) We cannot find the x-intercept of the perpendicular line unless we are told a point...

Asked by abdulhaneef on via web

1 educator answer

• Math
You accidentally left out the number of toppings from the second pizza but I assume it is 4 since it appears to be one higher by the price given. We are to find the price of a plain pizza and the...

Asked by quddoos on via web

1 educator answer

• Math
To satisfy the first constraint, namely A+B+C+D=6 we need four natural numbers (0 and integers) that sum to 6. The possibilities are (where the string of four numbers is in no particular order):...

Asked by summercbrown on via web

1 educator answer

• Math
Interpolation is the process of estimating or predicting the value `y = f(x_3)` of an unknown but observable function`f` at a point `x_3` between two points `x_1` and `x_2` (`x_2>x_1`) where the...

Asked by colormenae on via iOS

1 educator answer

• History
The correct answer to this question is D. It was Al-Khwarizmi who is typically credited with developing algebra, or at least with writing the first known book on the subject. He did this in the...

Asked by qu950827 on via web

1 educator answer

• Math
We wish to evaluate the expression `10^(((x+y)/2) - 3z)` First, simplify the power into seperate terms involving each of `x`, `y` and `z` only: `10^(((x+y)/2) - 3z) = 10^(x/2 + y/2 - 3z)` Then...

Asked by inquire123 on via web

1 educator answer

• Math
First evaluate the expression under the square root sign: `x^2 + 2x + (y-1)^2 - 2xy = x^2 + 2x + y^2 - 2y + 1 - 2xy` `= x^2 + y^2 -2xy + 2(x-y) + 1` Now `(x-y)^2 = x^2 + y^2 - 2xy` So that...

Asked by phanpal999 on via web

1 educator answer

• Math
We have 1) x + y + z = 2013 2) xyz = 2013 It is clear that one of the values, x for example, needs to be very close to 2013. Using the golden ratio is a natural avenue to try here. The golden ratio...

Asked by maroalgo on via web

1 educator answer

• Math
A factor is a term that divides an expression exactly. The gcf is the greatest common factor. Let's start with the additive expression `16x^3 + 16x^2 + 10x` This factorises to `2x(8x^2 + 8x + 5)`...

Asked by monique06 on via web

1 educator answer

• Math
`E_6` is an elementary matrix. That is it is a matrix that can be reached from the identity matrix of the same dimension by an elementary operation. We have that `E_6 ((1,3,4),(2,2,3),(-5,4,4)) =...

Asked by mrbest55 on via web

1 educator answer

• Math
`E_4` is an elementary matrix. That is, one that can be reached from the identity matrix of the same dimension by an elementary operation. In this case the operation is multiplying row 2 by 4....

Asked by chocobob on via web

1 educator answer

• Math
The matrix `U` is the product of some particular set of elementary matrices. An elementary matrix can be reached from the identity matrix of the same dimension by an elementary row or column...

Asked by masterpiece11 on via web

1 educator answer

• Math
We use a letter to designate our mystery number, it doesn't matter what letter we use, but most use `x` Then we need to use the relationships in the story problem to set up an equation. Four times...

Asked by tricia501960 on via web

1 educator answer

• Math
`f(x)=3x+1` `g(x) = x+2` `(f+g)(x)= f(x)+g(x)=(3x+1)+(x+2)=4x+3`` `That's how you find the sum of two functions of x.

Asked by user7114132 on via web

1 educator answer