Mathematics

Solve by factorization

x^4 + x^3 y - x^3 y^2 - x^2 y^3 + x y^2 - y^4-Rearrange the terms to get: x^4 - x^3y^2 + x^3y - x^2y^3 + xy^2 - y^4 (x^4 - x^3y^2) + (x^3y - x^2y^3) + (xy^2 - y^4) You can then factor by grouping x^3

Help with Simultaneous Equations

I was doing good then i saw this question ive re-written it 2 times already. Why is the answer... (100/13, -45/13) x^2+y^2-2x+6y-35=0 2x+3y=5-x^2+y^2-2x+6y-35=0 Solve the second equation for x 2x + 3

Why does ∫(e^(-x))/(x^(1/2)) from 0 to infinity converge

I just got out of a calc II final, and have a few questions. We never get the final back, or see the grade, so this is basically for closure: 1. Why does ∫(e^(-x))/(x^(1/2)) from 0 to infinity conver

I need help in Logarithms

How to convert log(base7) of 2x-1 to log that has the base of 5?-First, I have this formula memorized log_7 (2x-1) = log_b(2x-1) / log_b(7)where b can be any base.I usually use natural logarithms (ba

Is my calculus book wrong

Im differentiating x^2 + xy - y^2 = 4. When I differentiate, I get: First, 2x + (x)dy/dx + y - (2y)dy/dx = 0 Next, 2x + y - (2y + x)dy/dx = 0 Then, (-2y + x)dy/dx = -2x + y Solution: 2x + y / 2y + x (

Trigonometric Identities, Make Left side equal the right side

tan(30) + 1÷tan(30) = 1÷sin(30)cos(30)-Prove : tan(30) + 1÷tan(30) = 1÷sin(30)cos(30) L.H.S. = tan(30) +1/tan(30) = [tan^2(30) + 1] / tan(30) L.H.S. = sec^2(30) / tan(30) = 1/[cos^2(30)*sin(30)/cos(30

Convergence of this series

Hi guys, I was trying to do this problem with the ratio test to see its convergence. I get divergent as the ratio test gives me an answer > 1 but wolframalpha tells me its convergent by ratio test. Ca

How much is 12% our of 55,061.96

I WAS IN COURT AND I WONT THE BIG AMOUNT BUT HE HAS TO PAY ME6% EVER YEAR HE DOESNT PAY HOW MUCH WUD DAT BE?? THIS IS WAT THE COURT SAID (The defendant shall pay The claimant the sum of $55,061.96.The

Natural logarithms- help please? Even if you dont know all of them(:

21. e^-ln2 25.e^2*e^-2 14.-ln1/2 18. ln8+ln4 19.ln8-2ln2 27.ln 1/2- ln 1/4 24.ln(e^ln2)-21. e^(-ln2) First off, anything to the negative power can be 1/(that thing to the positive power) For example,

What is boolean algebra

Boolean algebra is the algebra of two-valued logic with only sentential connectives, or equivalently of algebras of sets under union and complementation. The rigorous concept is that of a certain kind

How to convert or what is the result of the sum 616.343(decimal) in binary

Dont laugh it isnt that much easy for a grade 9 student.....-use your calculator program in windows under accessories. Click view scientific type 616.343 then chose radial option bin... and get a whol

Algebra 2 Homework Help

For what value(s) of x is the expression undefined? 2x^2-x-10/6x^3-13x^2-5x thanks-I imagine you mean (2x^2-x-10)/(6x^3-13x^2-5x) This problem will be undefined with the denominator is equal to zer

Practice test math questions help

Two snails are three feet apart and directly facing each other. If one snail moves forward continuous at .04 inches per second and the other moves forward continuously at .05 inches per second, how ma

I'm stock on finding the Inverse of a 3 x 3 Matrix - My head hurts - Please HELP!

The given matrix is: 352 477 589 So far heres what I got: 1........1.67...... 0.67|0.03.....0..........0 0.62.......1........ ..0|0.33....-0.095...0 0.03.......0.......... 1|-0.28....0.........0.17

Please help with these math problems.

1) Find two consecutive even integers whose product is 360. 2) two boats travel from the same dock at the same time; one heads north while the other boat heads east. two hours later the boats are 26