Mathematics

Can you help match these math words with their definitions

Words: voluntary-response, systematic, random, stratified, convenience Definitions: by chance members choose to be in the sample according to a rule or formula at random from randomly chosen subgr

Statistics Help PLEASE!!!!!

Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental g

Integration help!!!!!!!!

the function f(x) is given. f(x)=7for x xfor x > or = 7 find the integral 0 --> 11f(x)dx-INT( f(x) dx ) Break integral into two parts: Part 1: on 0 Part 2: on 7 Part 1 evaluates to: 49 Part 2 eva

How to solve using quadratic formula: 4x^2+17x-15=0

4x^2 + 17x - 15 = 0 4x^2 + 20x - 3x - 15 = 0 4x(x + 5) - 3(x + 5) = 0 (x + 5)(4x - 3) = 0 x = -5 x = 3/4-Plug in a=4, b=17, c=15 into the quadratic equation. x= {-b±√(b^2-4ac)}/2a-Have you been taught

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

Probability question

How many ways are there to pick a first place, second place, and third place winner in a contest with 40 participants?-There are 40 ways to pick the first place winner (all 40 contestants). Then, afte

I have a repeated Eigen value ! how do i get alternative eigen vector so i dont have 2 same vectors

The matrix below gives me 3 eigen values. 2 which are equal: [2 0 0] [1 3 0 ] [1 1 2 ] When i type this matrix into Eigen value calculator online it says the corresponding Eigen vectors are: For the

How to prove f is uniformly continuous

Show that, if f:[0, ∞) → R is continuous and has a finite limt at ∞, then f is uniformly continuous on [0, ∞). Thank you.-Let ε > 0 be given. Since f has a finite limit L at infinity, there exists a

I need help with Sigma notation

30 E(5i-1) i=1 how do you solve this faster and also i need help :D-30 E (5i-1) i=1 = 30[5*29/2 -- 1] = 30 [72.5 -- 1] = 30[71.5] = 2145-=5Ei-E1=5X30X31/2-30=2295 NB Ei for i=1 to n =n(n+1)/2; Ec

Trick Question: How far does the fly travels

A room measures 20 x 40 ft. and has a 10 ft. ceiling.A fly is in one of the upper corners of the room.The fly walks down a wall and across the floor to the diagonally opposite corner of the room.The f

Problem with algebra, assistance

what steps do I take to work this problem? Simplify.9y^2-3y-2/6y^2-13y-5divide by 3y^2+10y-8/2y^2+13y+20arrgghh!!!-Okay, so to go through it step by step, write the two fractions out on a piece of pap

Related rate question

A street light is at the top of a 11 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 4 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 30 ft

Calculus help please. Find the volume

1. Find the volume of the solid obtained by rotating the region bounded by x = y^2 and x = 3y about the y-axis. 2. Find the volume of the solid obtained by rotating the region in the first quadrant b

How do I isolate o? Math help!

How would I manipulate this equation to isolate o? Z=(x-u)/o-o = (x-u) / Z

Consider the equation f(x) = x^4 In(x)

Can someone work this out please??? Thank you! (a) Find the interval on which f is increasing. (b) Find the interval on which f is decreasing. (c) Find the local minimum value of f. (d) Find the infl