Mathematics

The rth term of an arthimetic series is (2r-5).

A.) Write down the first three terms of this series. B.) State the value of the common difference.--3 , -1, 1 common difference +2

Maths question! linear equation! help!

divide 1380 (it is sum of money!) among Ahmed John and Babita so that amount ahemed receives is 5 times as much as babitas share and is 3 times as much as johns share!! answers is 180 900 300! helpppp

Find the interval of convergence of ∑n=0 (3^(2n))/(10^n)

Please show all steps! Thank you!-S=10, assuming infinite series. I dont know what intervals of convergence have to do with it.All finite series are convergent.

For what value of k is the lim x>infinity for sinh(kx)/cosh(5x) finite

sinh(kx)/cosh(5x) I solved it down to e^(k-5)x Finite value defined as k so solving for it gives me a value of 5 The interval the way I solved it should look like (-infinity,5) however Im getting it

Find the equations of both of the tangent lines to the ellipse x^2+4y^2=36 that pass through the point (12,3).

Find the equations of both of the tangent lines to the ellipse x^2+4y^2=36 that pass through the point (12,3).List the line with the smaller slope first thank you!!-Hello, x² + 4y² = 36 y² = 9 - x²/

Algebra 1 question!!!!!!!!!

write an equation of the line that passes through the given point and is parallel to the given line and perpendicular to the given line. (-1.4) y=-x-4-The line is in y = mx + b form. So the slope i

Why such ignorance about squaring negative numbers, as in "-2^2"

Not just all yahoo answers but even excel says that -2^2=4 whereas this is totally wrong, as all math books will agree, since negation is taken as a multiplication, and exponentiation is done before m

A man walked diagonally across a square lot. Approximately, what was the percent saved by not walking along th

Let the side of the square(ABCD) be x metres. Then, AB + BC = 2x metres. AC = 2x = (1.41x) m. Saving on 2x metres = (0.59x) m. Saving % =0.59xx 100/2x%= 30% (approx.)-......

MATH HELP!!!!!!!!!!!!! :P

Write the equation of the line that passes through (2, 4) and (1, -3) in slope-intercept form please help :]-y = mx + b m = (-3 - 4) / (1 - 2) = -7 / -1 = 7 y = 4 x = 2 4 = 2*7 + b 4 = 14 + b -10 =

Maths Help?? (Volume & Surface Area) ...Quick!!

So we just started the chapter of volume and surface area in high school (1st year) so I dont consider myself an expert on it but a question which i need your help today is as follows : A rectangular

Marked price questions

The marked price of a bag was $412.50 . The marked price has decreased by 12.5% since last year. Find its marked price last year.-M.P = $412.50 decrease % since last year = 12.5% Therefore,M.P last ye

Need help with the following Surds questions??...

1.Expand & simplify (√5+1)( √5+1) 2. 3/√12 expressed with a rational denominator & simplest form is? 3. √3/√2-1 expressed with a rational denominator is? 4. Express the following fractions in simples

Quadratic equation problem ax^2 + bx + c = 0 -- will give best answer.

Write a quadratic equation in the variable x having the given numbers as solutions. Solutions are -10, 1-Working backward, if -10 & 1 are the solutions, then the factorization of the quadratic is

How do I solve this: 5π/4 + 2π

How do I solve this: 5π/4 + 2π? and: -π/2 + 2π?-the first one can be write as 5*/4＋8*/4，so the answer is 13*/4 and the second one is -*/2＋4*/2＝3*/2 wish it helpful to you ..

Factor 20b^2+100bf+125f^2

5 * 4²*b² + 5*2*2*5 b f + 5* 5² f² 5*(2b + 5f)²-20b^2+100bf+125f^2 (10b+25f)(2b+5f)