ItzMe

Thank you!

If we take a look at the seccound equation, we can get from x-5y=19 to x=19+5y. So after that we can substitute x=19+5y into the equation 6x+2y=-10 and we would get 6(5y+19)+2y=-10, so if we continue simplifing it we would get 30y+114+2y=-10,

32y+114=-10, 32y=-124, y=-3.875 so x=19+5(-3.875)=19-19.375=0.375. 

So our answeres are:

y=-3.875 or 3 and 7/8

x=0.375 or 3/8

Imagen this as a venn diagram, if there are 9 first class math and english marks in the middle, and 70 first class only english marks + first class math and english marks, you have to take alway the number of first class math and english marks. So if you do that, you get 70-9=61.

Ok, thanks

the answere would be 2019, beacuse if you start solving it, you'll see the pattern (2/1 * 3/2 * 4/3 *...*2018/2017 * 2019/2018) so it will all simplify down to 2019.

No, beacuse if you take everything to the comon denominator, you get  (x^2+6)/x=(y^2+6)/y. Then if you mulytiply everything by xy you get yx^2+6y=xy^2+6x, so they dont have to be eaqual.

No problem!

We know how to compare quotients to 0. We start by subtracting 1 from both sides to get (3-z)/(z+1)-1 ≥0
We can simplify the left-hand side as (3-z)/(z+1)-1=(3-z)/(z+1)-(z+1)/(z+1)=(3-z-(z+1))/z+1=(2-2z)/(z+1)
so now our inequality is (2-2z0/(z+1) ≥ 0.
We can simplify this a bit by dividing both sides by 2 to get (1-z)/(z+1)≤0. Then, we multiply by -1 to turn the numerator on the left into . We must remember that multiplying by a negative means we reverse the inequality, so we have (z-1)/(z+1)≤0.
The quotient of two numbers is negative if and only if one of the numbers is negative and the other is positive, from which we find that (z-1)/(z+1) is negative for -1< z <1. We also could have built a table to analyze the possibilities:

The inequality is nonstrict, so we must also include any values of  for which (z-1)/(z+1)=0. Therefore, the full solution is -1

Is isabella where to win, she would need to get 4 more point. The probability of her getting a point is 1/3, so if she needs to get 4 points, the probability would be 1/3 * 1/3 * 1/3 * 1/3 =  (1/3)^4 = 1/81. So the answere is 1/81.

If you read on his profile, he said that he wanted to take a break, heres the link.

https://web2.0calc.com/questions/gotta-take-a-break-folks

Sorry, I just got it. My bad. Sorry.

I don't get were you get the 28+1

Y, beacuse if you simply look at it, even though it starts at a smaller number, it has 100 terms and the last term (100^2) is 10000 which is way bigger. So from here, I strongly belive that Y is larger.

If you go step by step you get:

1.  x^2+2xy-15y^2

2.  x^2-3xy+5xy-15^2

3.  x(x-3)+5y(x-3)

4. (x+5y)(x-3)

So from here pour answere is (x+5y)(x-3)

I don't think that there is a solution, beacuse if x=x+1 then there is no number that would satisfy x. Mabey you didn't correctly copy the questtion, if that is so, can you please re-write it? Sorry if this post isn't helpful.

So you have to find the lagest prime number under 28, beacuse if you multiple 2 numbers, even if they are prime, you will get a compostie number. And we know that the largest prime number less than 28 is 23, so from here the answere is 23.