Mathematics

How to solve y=x²+2³ , x=√4-³√27

x = 2-3 = -1 y = 1+8 = 9

How do I get the second value of x in this problem

(x-18)^(2/5)=9 I got 261, but its telling me that there is another answer. How do I get it?-(x - 18)^(2/5) = 9 x - 18 = 9^(5/2) x - 18 = sqrt(9^5) x - 18 = ± 243 x = 18 ± 243 x = 261 or - 225-(x

True or false calculus question

if f(x) is an even function then f (x-a) is also an even function?-An even function is symmetrical about the y axis as f(x)=f(-x). When we put f(x-a) though what we are actually doing is that we are s

Let n and m be relatively prime [ (n,m) = 1]. Prove that a ≡ b (mod m) and a ≡ b(mod n) if and only if a ≡ b

Let n and m be relatively prime [ (n,m) = 1]. Prove thata ≡ b (mod m) and a ≡ b(mod n) if and only if a ≡ b (mod m*n) .-One of the directions is much easier than the other.If a = b mod mn, this means

Why the properties of square roots are true only for negative exponents

I need it badly :(-You must have misunderstood your teacher, because your question doesnt make any sense. Square roots are an example of FRACTIONAL exponents. Could this have something to do with yo

List{#) How many different 10-digit numbers are possible to make with them

List {8,3,3,3,4,4,2,2,9,9} Show as much work please.-10! / (2! * 2! * 2! * 3!) 10! ways to permute ignoring duplicates, then discard duplicates by dividing out ways to permute them.-8333442299 33344

Find a and b : If |x - 3| < 7, then a < x - 2 < b

|x - 3| -7 -7+1 -6-|x - 3| (x - 3)² x² - 6x + 9 x² - 6x - 40 (x + 4)(x - 10) -4 a = -4, b = 10

Simplify the expression, where x is negative

Simply f(x) = (sqrt((x^4)+3x^2)) / x where x is negative. I get sqrt((x^2)+3) but the seems to be the wrong answer-f(x) = (sqrt((x^4)+3x^2)) / x f(x) = (sqrt[x^2((x^2) + 3)]) / x f(x) = |x| (sqrt

Compounded monthly - finite math

You can afford monthly deposits of $260 into an account that pays 4.5% compounded monthly. How long will it be until you have $9,100 to buy a boat? E-Loan, an online lending service, recently offere

One number exceeds another by 21. The sum of the numbers is 53. What are the two numbers

If you could tell me the two numbers, that would be great.-Just solve it by trial and error. Does 1 + 22 equal 53?Nope? (We start here because the difference must be 21.) Does 2 + 23 equal 53?Nope

How do I do this math question

9-2c+c= -13-9 - 2c + c = -13 1. Combine Like Terms 9 - c=-13 2.Isolate c -c=-22 c=22-Add the variable numbers together and add the regular numbers together (remember when 9 goes over to -13 it i

Square root question, please help! Thank you!

Find value of √2+√2+√2+√2... sorry, I have hard time to type the question. √2+ is inside square root another √2+, not answer 4√2.Hope you understand my question.-Let x = √2+√2+√2+√2..., then x = sqrt

Geometry: Help with this problem? Vertical angles & linear pairs

http://www.classzone.com/books/geometry/pdfs/g1_01_6ec.pdf I need help with #8. Ive been stuck on this problem for about 1 and a half hours! No matter how I try, I can never get the vertical angles

How do I find the X-Intercepts of f(x)=(x-2)^2 -9

Please help. Thanks.-(x-2)^2-9 x^2-4x+4-9 =x^2-4x-5 When You solve for the x-intercepts you factorise the equation. x^2-4x-5 =(x-5)(x+1) x=5,-1 Thus,the x-intercepts are (5,0),(-1,0) Graph this to see

ODE Salty Tank question (Can do the hard part, but not the easy part?)

Hi everyone, A 200L tank initially contains 100L of water with a salt concentration of 0.1grams/L. Water with a salt conc. of 0.4g/L flows INTO the tank at 20L/minute. Assuming there is instantaneou