anyone need help for maths?

uhmmm sorry, but for this question wouldnt the probability be slightly less than that?

If you don't simplify it, just so it's clearer to see:

so 4/10 girls, and 6/10 boys
P(boy) on the first choice = 6/10
but P(boy) on second choice (assuming a boy was chosen the first time) would be 5/9 as one boy has been picked so cannot be picked again?
So the overall probability would be 5/9 x 6/10, which is 1/3

Sorry if this is over complicating stuff

ah yeah you're right, my apologies

f(2x) stretches the graph vertically by twice as much.

2f(x) stretches (or squashes) it by 1/2 horizontally

Okay so first thing about the probabilities of each one just once.

Add them all together first so 4+6=10 students in the class

this means: 4/10 girls 6/10 boys which you can simplify to 2/5 girls 3/5 boys.

So now you want the probability of getting boys and then boys again.

If it's a probability of something and something else you times them together.

So 3/5 times 3/5 = 9/25

2x squared - 7x+3

FIRST, you do the first number times the end number, ( 2 TIMES 3= 6)

SECONDLY, two numbers that times to make 6 and plus to make -7, the answer is -6 and -1

THRIDLY, the expression was 2x squared -7x + 3,

NOW it becomes 2x squared -6x -1x +3 , ( we split the -7x into -6x and -1x)

NOW we factorise each part seperately


so we first factorise 2x squared -6x which is 2x(x-3)

Then we factorise the -1x + 3 which is -1(x-3)

which becomes (2x-1) and (x-3) which is ur final answer

2x squared - 7x+3

FIRST, you do the first number times the end number, ( 2 TIMES 3= 6)

SECONDLY, two numbers that times to make 6 and plus to make -7, the answer is -6 and -1

THRIDLY, the expression was 2x squared -7x + 3,

NOW it becomes 2x squared -6x -1x +3 , ( we split the -7x into -6x and -1x)

NOW we factorise each part seperately


so we first factorise 2x squared -6x which is 2x(x-3)

Then we factorise the -1x + 3 which is -1(x-3)

which becomes (2x-1) and (x-3) which is ur final answer

Wait one question, when you split up the equation into 2 to factorise seperately how do you know which split up part to put with the other? does that make sense? For example with this how would I know to factorise 2x^2-6x and -1x+3 rather than 2x^2-1x and 2x^2-6x