Mathematics

How many times the number of atoms of silver in the universe

The number of atoms of platinum (Pt) in the universe is estimated to be 1.4 times the number of atoms of silicon (Si) in the universe.The number of atoms of silver (Ag) in the universe is estimated to

High School Calculus help. intercepts

I for the life of me cant remember how to do this. Find any intercepts.y^2=x^3-4xThere wouldnt be any Y intercepts are there?How do i find the X? also y=x^2+x-2-For y-intercepts, put x = 0, then

Find the area enclosed by y=x^2-2x-3 and y=x+1

I got 17/3 is this right? If not how is this problem solved?-Here is the problem solved on a piece of paper! sorry for being lat but i was looking for my camera :D http://imageshack.us/f/684/imgfffff

Need help with logarithms

I know you need to use logarithms to solve the equation, but i get lost or am missing a step if anyone can walk me through it, not necessarily solve, that would be great! 2^x + 2^-x = 8-2^x+2^(-x)=8

Mathmatics pre algebra !

the membership of the french club was 12 girls amd 18 boys. what precent of the club were girls? and also : 3/5 in a precent thanks!-2/5= 40% were girls 3/5= 60%-get total amount of people 12+18=3012

Find the points of intersection, please help

x^2 + y^2 = 5 x - y = 1-1) x^2 + y^2 = 5 2) x - y = 1 or x = y + 1 substitute eq(2) into eq(1): (y + 1)^2 + y^2 = 5 y^2 + 2y + 1 + y^2 = 5 2y^2 + 2y + 1 = 5 2y^2 + 2y - 4 = 0 using Quadratic Equation:

The sum of the first three terms of a convergent geometric series is 19. the sum of the series is 27. find the

Geometric series are defined by their first term (call it a), and the common ratio (call it r). That its convergent tells us that |r| a + ar + ar^2 = 19 a(1 + r + r^2) = 19 a(1 - r^3) / (1 - r) = 19

Find the point on the circle that lies closest to (1, 3)

find the point on the unit circle that is closest to (1,3)-Note that the unit circle has equation: x^2 + y^2 = 1. Suppose that (x, y) lies on the circle. The distance between (x, y) and (1, 3) is: d

Solve this i keep gettin 59 and i think im wrong

solve for N 7(1+5n)+6(1+4n)=13-7(1+5n)+6(1+4n)=13 multiply out 7 + 35n + 6 + 24n =13 combine terms 13 + 59n = 13 59n = 0 n = 0-7(1+5n)+6(1+4n) = 13 7+35n+6+24n=13 59n=0 n=0 Check: 7(1+0)+6(1+0)

Completing the square to rewrite in Vertex Form

The example below shows a quadratric function transitioning using completing the square into the Vertex form, so that (h,k) are easily visible.... f(x) = 2x^2 − 4x + 1 = 2(x^2 − 2x) + 1 = 2(x^2 − 2

Finding the domain & range of a ration function: Calculus

√((4-x)/(x^2-4)) The entire fraction is in the radical. How do I find the domain & range of this.?Im lost in the dark on this.Thanks to anyone who helps.-This is algebra √((4-x)/(x^2-4))for it to ha

Am i wrong with these

am im wrong with these? solvefor A: i keep getting -3 -6(3-3a)-8(6a+5)=32 solve for X: i keep getting 4.75 6x-2x+8=6+5-Solving for A: -6 (3 - 3a) - 8(6a + 5) = 32 -18 + 18a - 48a - 40 = 32 -30a = 32

Find the vertical asymptote of this function (if it exists)

f(x)= 4x^2+4x-24/(x^4-2x^3-9x^2+18x) Please help? Im thinking this has no vertical asymptote, but I dunno... Help?-Note that the numerator factors to: 4x^2 + 4x - 24 = 4(x^2 + x - 6) = 4(x + 3)(x - 2

Math word problems HELP

okay i have seriously spent 20 minutes trying to figure this out. a contractor wants to use 34 feet of molding, cut into 3 pieces. the long piece is 1.5 feet longer than three times the length of eac

Absolute value expressions written as piecewise expressions

i have to rewrite this as a piecewise expression : y=|6+2x|+1 ive gotten this far: positive case: y=6+2x+1 --> y=2x+7 negative case: y=-(6+2x)+1 y= -2x-5 so now what? what is the actual piecewise