Math

I will be making math problems:

I will give a trophie to the first 5 people who solve it correctly.

Remember, these are super easy, but I will make them harder as they go on.

Pre-Algebra problem: What is the mean of the set of numbers {1,3,4,2,5,8,9,3,2,3}

Algebra: Solve for x: (2x^2)+3x-9

Algebra 2 (you may have learned this in algebra 1): Solve for x: (4(x)^2)+4x-4

Thanks!

Oh by the way, show at least 1 step that you took to get your answer, I will know if you copied somebody elses work.

#1 is 4 that's all I know because I'm only in 11

u dont need to show ur work for this bc ur the first one to answer the problem

Mean = 4

work plz

Lol I haven’t learned any of those but I have learned the 1rst one, so we add up all the numbers which gives us 40, then we just dived by the number of values in the set , so there are 10 values so 40 divided by 10 is 4 , easy 🙃

Mean = 4 since 1,3,4,2,5,8,9,3,2,3 add up to 40, and because there is 10 of them, 40/10 = 4.

And also, isn't there supposed to be an equal sign in the second and third problem?

1) mean is 4 because they add to 40. 40/10 = 4/1 = 4 

2) I'm from Britain and I am only 12. Here goes nothing... 2x^2 +3x + 9 = 0. 2x^2 +3x = 9.  (2 x x^2) +3x = 9. trial and error - if x = 1.5, 4.5 + 4.5 = 9. x=1.5

3) (4(x)^2)+4x-4 = 0. (4(x)^2)+4x = 4. 4x^2+x = 1.  I am now stuck but what a decimal it's going to be...

Yes sorry, i forgot to add the =0 at the end of the quadratic equations

#2

#1 is correct, #2 is partially correct, but you need 2 answers, #3 is wrong, and i think you dont have an answer?

#4

Mean = Sum of values (40)/number of values (10) = 4

For the quadratic: 2x²+3x-9 = 0

And then: (2x-3)(x+3) = 0 

Which yields: (2x-3) = 0, 2x=3, x=3/2 or 1.5

And: (x+3) = 0, and thus x = -3

So x = 1.5 or -3

good work! #5 for #1 and #1 for #2

I have not learned dat yet

Thx

im saying that you were the second person to solve it correctly

ohh , ok thanks, yayy

I'm only in 2nd grade, but I know far past that I even know 2 variable equations