Please Help. Need for Class in 45min.?

I don’t know. I posted your question in the Mathematics section. And one response was this :

The first one has a domain (-infinity, infinity) because it is defined along the x axis for all x, that is there is not value of x that will make the denominator equal to zero.

second one:

domain is (-inf,0)U(0,inf) because when t=0 the functionis undefined(you can’t divide by zero)

third:

domain is (-inf,-5/2)U(-5/2,inf)

you just need to find the value of x that will make the denominator equal to zero, and make sure to use parenthesis and not brackets to show that -5/2 is not included in the domain(once again, if x=-5/2 the denom would be equal to zero and the function is undefined when the denom=0, so the domain does not include -5/2).

last one:

factor the denominator:

2(x^2-7*x+10) = 2*(x-2)*(x-5)

the two values of x that make the denom=0 here are x=2 and x=5 so the domain is

(-inf,2)U(2,5)U(5,inf)

Thats pretty lengthy and it looks like a math 12 pure question….If i remember correctly u need to draw out the function to have a better understanding of where your domains lie….as far as an answer goes…u should have done your homework earlier.

10,4,7,2 TIP: Never wait to the last minute to do things.