Answer:
Step-by-step explanation:

we take the LHS so here goes,

since ,
the identity becomes,

now, we know,
and 
the identity becomes,


sin A and cos A cancel out it becomes zero

Splitting the denominator the identity becomes

Hence,

1. -7<-4
2. -4>-7
Step-by-step explanation:
-4 is greater than -7, because -4 is a small negative number, and is closer to 0.
The answer for this 19
But if you want to be serious the answer is Fish
Answer:




With 



So then the x intercept would be (0,-5). And finally we can graph the function as we can see in the figure attached.
Step-by-step explanation:
For this case we know the following function:

We can begin the zeros or the values where the function is 0 like this:

And solving for x we got:

Now we can rewrite the expression like this:

And we can find the position for the vertex at x with this formula:

With 
And replacing we got:

And then with the coordinate of x for the vertex we can find the coordinate of y replacing the value of x obtained for the vertex.

Then we can find the intercept using the value of x=0 and replacing into the function we got:

So then the x intercept would be (0,-5). And finally we can graph the function as we can see in the figure attached.
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