Mathematics

What is the value of the y variable in the solution to the following system of equations

2x + y = 5 x + 3y = 0 2. Solve the following system. x − y = 10 x + y = 4 thank you--3(2x + y = 5) x +3y = 0 -6x + -3y = -15 x + 3y = 0 -5x = -15 x =3 Plug x back into any of the original equati

6th grade math problem PLEASE HELP!!

Please help me solve this and explain how you got the answer. A 21 kiligram sample of rocks from the moon is composed of 40% oxygen and 19.2% silicon. How many more kilograms more is the oxygen than

Trig. simplification help

tan(127)+tan(-143)+tan(-143)-tan(-53) --------------------------------------… * sin^2(757) = tan(217)sin(683)[cos(217)+cos(143)] Result: tan(37) Top: tan(127)+tan(-143)+tan(-143)-tan(-53) =tan(180-5

Find the focus and directrix of the parabola

X^2=32y-x² = 32y y = (1/32)x² vertex (0, 0) p = 1/4(1/32)) = 8 focus (0, 8) directrix y = -8

Solving this equation: log base2(x)=log base2(7)

X=7. The equations are identical, youre just replacing x with 7.-x=7

I need help Identify the asymptotes of each function.

1. y=5/x a x=0,y=0 b x=4,y=1 c x=0,y=4 d x=0,y=0 2. f(x)=8/x-4 a x=4,y=0 b x=4,y=4 c x=4,y=0 dx=0,y=-4 3. y=1/x+4 a x=0,y=0 b x=0,y=0 c x=4,y=0 dx=0,y=4-in each of them, the degree of the top is 0 (co

What is the quotient of 4x^3 - 12x^2 + 8x / -4x

Divide each of the terms in the numerator by -4x 4x^3 ÷ -4x = -x^2 - 12x^2 ÷ -4x = 3x + 8x ÷ -4x = -2 Put it all together for the quotient: -x^2 + 3x -2--x^2+3x-2 Haha the guy above is such a douc

Differentiate e^x/9+9x

Differentiate the function (find y) y= (e^x)/9+9x-Using quotient rule, d(u/v)/dx = (vu - uv)/ v^2 Then, d(e^x/9+9x) = ((9+9x)e^x - e^x (9))/(9+9x)^2= 9xe^x / (9+9x)^2= xe^x / 9 (1+x)^2-Remember the q

Vertical and horizontal asymptotes

Find VA and HA for f(x) = (a^-1 + x^-1)^-1 where a is a positive number. I have to find it algebraically.-to find the horizontal tangent, as the following: f (x) = (a^-1 + x^-1)^-1 f (x) = ( (1 / a)

2x^2=9x+18 the solution set is {..}

2x² = 9x + 18 2x² - 9x - 18 = 0 (x-6)(2x+3) = 0 x = 6, -3/2

Calc 3 Help- Polar to rectangular

Hello im having trouble converting this equation to rectangular. r = 1/ 1+ cot^2 Theta Any help would be great-It helps to recall that cot²Θ + 1 = csc²Θ. r = 1/csc²Θ = sin²Θ ==> r^3 = r² sin²Θ =

How to prove this, using mathematical induction

How do I prove that n^3+2n is divisible by 3 for all positive integers of n, using mathematical induction? Thanks [:-For n = 1 1^3 + 2*1 =3 is divisible of 3 Let say for n=k this is true then k^3 +

Simplify the following radical help

4√y + 9√y + 4√y= How do we solve this? thank you-4*sqrt(y) + 9*sqrt(y) + 4*sqrt(y) = 17*sqrt(y)

Algebra help???????

Jodi poured herself a cold drink that had an initial temperature of 39 degrees F and immediately went outside to sunbathe where the temperature was a steady 96 degrees F. After 5 minutes, the temperat

What is the sum of all the odd numbers in this list minus the sum of all the even numbers

3 7 9 5 2 6 4 8 3 7 2 9 6 1 8-(3+7+9+5+3+7+9+1) - (2+6+4+8+2+6+8) = 44 - 36 = 8-Sum of odd numbers =(3+7+9+5+3+7+9+1) =44 Sum of even numbers =(2+6+4+8+2+6+8) =36 differece=(sum odd numbers) - (sum