Mathematics

Math word problem. please and thanks

In a multiple-choice test, each question has four options. Students will get 5 points for each correct answer; lose 1 point for each incorrect answer; and receive no points for unanswered questions. A

How to solve this normal distribution question with 2 variables

The time X it takes a consultant to see a new patient at a hospital out-patient clinic may be assumed to be normally distributed with mean “16 minutes” and standard deviation “1.5 minutes”. The time Y

DO YOU THINK THIS IS A FUNNY MATH PROBLEM

http://www.youtube.com/watch?v=8u80SOyQw…-Is the answer non applicable? Some people on youtube tried to solve it and said the answer is two. Im sticking with my answer. That it is non applicable.-26be

39.5 is 50% of what? help

24 39.5 is 50% of what?-IDK what the 24 at top is but since 50% is half, meaning 39.5 is half of something then you have to multiply 39.5 by 2 to get 39.5 is 50% of 79-39.5 is 50% =39.5/0.5 =79 ans

Statistics question. help please

A Mathematics Professor assigns letter grades on a test according to the following scheme: A: Top 10% B: Scores below the top 10% and above the bottom 60% C: Scores below the top 40% and above the

First to factor this problem gets 5 stars

9x^2+42+49 (Not homework, I only had to prove it was a perfect square trinomial)-(3x+7)^2-Factored: (3x+7)(3x+7)or (3x + 7)squared Perfect square trinomials can be found by squaring a binomial.-9x^2

Trig help (just sin, cos, and tan)

I need to get tan squared x - sin squared x to equal tan squared x times sin squared x ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Ive been trying to do this problem forever but nothing seems to be working

A parallelogram is drawn with a 60° angle as marked. Find the height of the parallelogram

A parallelogram is drawn with a 60° angle as marked. Find the height of the parallelogram i know the two bases are 5 and 7... what is the height.. answer plus work please!!-Ok, so when you drop an al

Can someone solve these three questions please. I would really appreciate it

in problems 1 to 3, find the remaining angle(s) and side(s) of each traingle if it (they) exists. 1.α = 10°, γ = 40°, side c = 2 2. a=10, side b= 7, side c =8 3. side a =1, side b =2, γ =60°-α = 10°,

How do I find this Integral

∫ x².e^(x/2) Thank you very much!!-Integrate by parts: u=x^2 dv= e^(x/2) dx so du = 2x dx v= 2e^(x/2) uv-integral(vdu) x^2* 2e^(x/2) - integral 2e^(x/2) *2x then you must integrate by parts on

Multiples of 157? or factors of 157

Multiples of 157?-Multiples of 157 are 157*n where n is any non-zero integer. Since 157 is prime, the only factors are 1 and 157-Multiples of 157 are bigger than 157. They are 157 times something else

What would this number be

Can someone to tell me what this number is? (e.g. 3,230,540 is 3 million, 230 thousand, 540.) 60,887,378,583,224,320 ^ That number.-Well its sixty quadrillion, eight hundred and eighty seven trillio

Help how would I solve this equation: 2z^2 = 2(z + 3)^2

Expanding (z + 3)², we obtain: 2z² = 2(z² + 6z + 9) Divide both sides by 2 to get: z² = z² + 6z + 9 Finally, rearrange the terms: z² - z² = z² - z² + 6z + 9 0 = 6z + 9 [Subtract both sides by z²]

Please help in Proving of volume.

An open water tank with a square base x m, and a height y m has a total surface area of 5m^2. Show that V = 1/4 ( 5x - x^3)-V = 1/4 ( 5x - x^3) Surface Area = x² + 4xy = 5 => 4xy = 5 - x² => y = (5

What is the value of x

x% of 950 = 50-(x/100)950 = 50 9.5x = 50 x = 50/9.5 = 5.263-x% of 950 = 50 same as x% ∙ 950 = 50 same as x% = 50/950 ...by dividing both sides by 950 same as x% = 1/19 ...by reducing 50/950 to lowe