Mathematics

Hard related rates problem (1 of 2)

Two taxicabs begin at the same time at the intersection of Park Ave and 59th St. One taxicab heads uptown (North) on Park Ave at 40 mph. The other heads west on 59th St at 30 mph. Both have the unbeli

AP Physics B Summer Webassign

I need help with the last question for my summer webassign. Unfortunately, I will be taking the math it is based off of while taking the Physics class, whereas everybody else has already taken it. So

How do I make an equation with these two points

(-1,-1) (1,-6)-Do you mean find the equation of the line ? First find slope y2 - y1 / x2 - x1 - 6 - - 1 / 1 - - 1 -5 / 2 equation of line y - y1 = m(x - x1) Plug in the coordinates and the slope (m) y

If your birthday was September 21, 1993 how old would you be right now

If your birthday was September 21, 1993 how old would you be right now?-You would be 17 years, 9 months and 6 days old-17 years 9 months 6 days (youll be eighteen next birthday)-17-17 years old.-17 yr

I need help with this: find (f(x+h)-f(x))/ h for this function..

Find (f(x-h)-f(x))/h for the function f(x)=x/(x+1) So far, I got [((x+h)/(x+h+1)) - (x/(x+1))] /h Im stuck from there. Any help would be appreciated.-You are doing good so far. At this point, clea

How do i do this math? PLEASE

i dont know what this kind of math is called or how to do it. help? anyone? please? i put these ^ to show it is an exponent f(-2)= (-2)^2-6(-2)+9--------------------(-2)^2-9-Its called algebra (f(x)

Help with math :( (question 20 characters long) -.-

it maybe seems like a dumb question but im not sure how to get this done: 4(a+1)^2 - 6(a+1)(a-3) + 9(a-3)^2=-Each set in paranatheses have to be solved first using the FOIL method, then distribute th

Surface area of a curve

Find the area of the surface obtained by rotating the curve y= sqrt(3x) from x=0 to x = 8 about the x-axis. I know the formula.... int 2PI * sqrt(3x) * (1+(dy/dx)^2)^(1/2) But it doesnt seem to be w

Logarithm question help needed

Express the following in the form ln x = ax + b and find the value of a and of b. (a) xe^-x = 2.46 (b) (xe^x)^2 = 30e^-x need the workings please-(a) xe^-x = 2.46 ln (xe^-x) = ln (2.46), taking ln o

If (2x-5)(2x+5) = 5 What is the value of 4x^2

A math problem I need help with from my SAT prep book. Thanks!-(2x-5)(2x+5) = 5 (2x-5)(2x+5) - 5 = 0 4x^2 - 25 - 5 = 0 4x^2 - 30 = 0{Take This} 4x^2 - 30 = 0 4x^2 = 30-The way to do it is expand out

If tan(theta) = 3/13 with theta in QI, what is the sec(2theta)

sec(2theta) = ?-tan(θ) = 3/13 3^2 + 13^2 = z^2 9 + 169 = z^2 178 = z^2 √(178) = z sin(θ) = 3/√(178) cos(θ) = 13/√(178) (sec(2θ) (1 / cos(2θ) ) (1 / ( cos^2(θ) - sin^2(θ) ) (1 / ( 13/√(178) )^

Is cosx/sinx the same ast cotx nd how

well cotx as you should know is 1/tanx and tanx = sinx/cosx so if u invert both sides (as in flip both of them up side down) u get 1/tanx=cosx/sinx therefor: cotx=cosx/sinx-Yes, by the definition

Interesting math problem. someone

A parabolic arch has a height of 25 feet and a span of 40 feet. How high is the arch 8 feet from each side of the center?-Ok, its a parabola so it has to fit the equation Y = squeeze factor * X^2 + ys

Prove that x^n > (x - 1)^n + (x - 2)^n

x > 0; n integer-Sounds like induction to me :P Let n=1. Then x-1 + x-2 = 2x-3. x>0, so… um... Your statement is false. Assume it is true. Then it should be true for n=1, x=3. But 3^1 > (3-1)^1

Simple logarithm question 10 points

Question 1, log3 x = 9 log x 3 Question 2, 4 log4 x - 9 log x 4 = 0 i got problem finding x, please help me with the workings. i will choose 10 pts within 10 mins.-I assume the first number is the ba