Mathematics

How many odd numbers greater than 500000 be made from the digits 2, 3, 4, 5, 6, 7

permutations-I guess he means that you can only use each digit once, if not, the answer is infinite. To be odd, the number has to end on 3, 5 or 7. To be bigger than 500000, the number has to start w

Solving systems of equations by computer

Im trying to solve two equations with two unknowns using the C language.The equations are: a1 + x(y-a1) = b1 a2 + x(y-a2) = b2 Here a1, a2, b1, and b2 are known.Im trying to find values x and y.This

Statistics, Population Proportion/Margin of Error

In a survey, the planning value for the population proportion is p* = .35. How large a sample should be taken to provide a 95% confidence interval with a margin of error of .05? Im really having trou

What's the integral of 7/csc x

csc(x) = 1/sin(x), so 7/csc(x) = 7sin(x), and the antiderivative of that is -7cos(x)+C-∫7dx/csc(x) = 7∫sin(x) dx = –cos(x) + C

Stuck on a review question could someone help me its about math -_- grade 11

John climbed 60m up a cliff in first hour. In each of the next 4 hours he climbed 75% of the distance the previous hour. How far had he climbed after 5 hours? answer is 183m ...we so didnt learn thi

Please help with this math question!

Please help me solve this equation: log v27x = 1 - log v27 (x-0.4) Answer key: x=5.4 ***The v means the 27s are lower case. Thank-you!-Ok first things first, you should know that when subtracting lo

Y" + 6y' + 13y = δ(t-2) + δ(t-5) with y(0)=y'(0)=0

solve using Dirac Delta (transforms) Note: we cannot solve using partial fractions!!-What do you mean by we cannot solve using partial fractions? You dont need partial fraction decomposition. Take

Precalc Help Someone please help me!!!

I am having a bit of a problem doing these problems, can someone please help me? 1. Find all real numbers x in [0, 2pi) that satisfy: tan(x)=3 2.Find all real numbers x that satisfy: 2sin^2(x)-3sin(

Statistic sample variance question

here is the number given 12, 16, 10, 9, 18, 5, 14, 11, 20 i know how to find the population variance but i cant figure out the dam sample variance i got 12.8 as a mean and the n=8 since 9-1=8 how do

Stats, Which form of analysis is best for which type of investigation

Could you please tell me which type of analysis goes best with which type of investigation? A. paired t test B. two sample t test C. one way anova D. two way anova E. chi-square test F. multiple reg

3 Algebra Questions(i'll choose best answerer for sure)

*Simplify first 3* 1. (-2)^4 X^3 Y^6----------------------(-2)^2 X^-2 Y^-3 2. Pretend that the little paranthesis that im going to insert into this problem are one BIG one that cover both of the num

How do you factor 3a^2-13a-30 ? I know the answer is (3a+5)(a-6)

I know that is the answer, but I dont know how to get there. I was told to factor problems like this: a^2+2a+1 I first multiply the outside numbers together, which equals 1. I then find the factors o

2x-3[x-2(4-x)]=?? please break this down so I can do this simply

please include each step for order of operations-2x - 3[x - 2(4 - x)] 2x - 3[x - 8 + 2x] 2x - 3[3x - 8] 2x - 9x + 24 -7x + 24-[2X-3(X-20)(4-X)} First; solve (x-2)(4-x) X times 4, then x times – x

Need help with one of these: - b + √ b² - 4ac

Can someone please explain I did the problem twice and still got it wrong: Here is the problem z² -2z -11 =0 I got 2 ± √-4 - 4 (1)(-11) ----------------------------2(1) = 2 ± √40 ---------------2 =

How to calculate how much my final exam will affect my final grade in the class

I have a 90% in the class The exam is worth 20% How do I calculate what my final grade in the class will be depending on my exam mark (Id like if you could show me an example, suppose I got 50% on th