Mathematics

Will I pass my Maths exam

Well ....i am not good in maths.i had written a maths exam.But i dont know any answer in that question paper. IF i failed in that subject , i will really worry.My teacher will treat me so bad If I fai

Please help. Find the dimensions of a rectangle that has a perimeter of 16cm and area of 13 cm^2

2x+2y=16 xy=13 xy=13 x=13/y 2x+2y=16 2(13/y)+2y=16 (26/y)+(2y^2/y)=16y/y 26+2y^2=16y 2y^2-16y+26=0 2(y^2-8y+13)=0 y^2-8y+13=0 y=5.7 or y=2.3 xy=13 x(5.7)=13 x=13/(5.7) x=2.3 when y=5.7 OR xy=13 x

Expand cosh^8θ in terms of hyperbolic cosines of θ

Recall that cosh(x) = [ e^(x) + e^(-x) ]/2 Then cosh(2x) = [ e^(2x) + e^(-2x) ]/2 cosh(4x) = [ e^(4x) + e^(-4x) ]/2 cosh(6x) = [ e^(6x) + e^(-6x) ]/2 cosh(8x) = [ e^(8x) + e^(-8x) ]/2 By Binomial Exp

Rationalize the denominator

5/√x -3 what is five over square root of x minus 3 ?? any ideas? where do i start first? help please-We can multiply by sqrt(x)+3 both side numerator and denominator so it becomes 5/(sqrt(x)-3) *(

Algebra question(factorising)

p^2-3pq+2q^2 and r^2-6rp+8p^2 please anwer this for me and also with specific solution (so i could understand easily) Thanks-factor first and last term of each expression. Factors of p^2 is p and p.

How do you find P(A' U B)

If P(A) = 0.3, P(B) = 0.2, and P(A and B) = 0.1-To find the value you can find conditional probabilities P(A|B) = P(A and B) / P(B) =1/10 / 2/10 = 1/2 P(A|B) = 1/2 Now find P(A|B) P(A|B) = P(A and

I need some Math help for Pre-Algebra

What is the solution set to for the given inequality if the replacement set for x is {2, 3, 4, 5, 6} 1. 2x + 4 > x + 2 A : x = {2, 3, 4}B: x = {5, 6}C: x = {2}D: x = {2, 3, 4, 5, 6} ----------------

How would you solve this problem algebraically

Here is the problem: Giancarlo has two more than three times the number of baseball cards that Antonio has. If Giancarlo gave Antonio 12 of his cards, they would each then have the same number of car

What does it mean when a math problem is "open"

Ive been wonder what it meant when it said open and I still cant figure it out, and sorry if I seem a little stupid >.-you cant figure it out and neither can anyone else. Open just means its too hard

Solving linear systems

ive been doing practice questions all day and doing fine but I cannot seem to get this one. can anyone help? Solve the given linear system 6u−v=0 – 8u+4v=0 8u−2v=0-Hi Chuckie. Let me arrange the 3

Simplifying Decimal Equations)Solve:I need to know the steps in order to simplify. 0.1p - 0.2p + 2 =-4.6

I know your suppose to times each by ten ,which the equation would become 1p - 2p + 20 = - 46.What is the rest of the steps to simplify this equation.I know the answer is P = 66. How do I solve this d

Malthusian growth problem help

The biomass of a certain Malthusian population has been increasing at a steady 6% per decade. What is the ANNUAL percent increase of this population? help! i got 0.6% which isnt right-(1+r)^10 = 1.0

How do I convert 14.8 hours into normal hours

Ive completely forgotten, Ive got 14 hours, but how many minutes have I got? Show working out. Thanks.-Multiply 0.8 by 60 (as in 60 minutes) and you get 48 therefore 14.8 hours = 14h 48m-Ok, so you h

Logarithms - simple but confusing

I can do the simple ones, but once they include fractions and stuff I get lost! Using laws of logarithms, simplify the following expressions to a single log term: a) 2/3 logx + 1/3 logxy^3 b) log

HELP!!! Find the number of units that produces a maximum revenue. The revenue R is measured in dollars and x

is the number of units produced. R = 80x – 0.0002x^2 I have no idea where to begin with this problem so could anyone help me by writing out the steps? Thank you!!-Candice - This is a parabola.Also