7y−4(9/4y−6). simplified

−2y+24

Step-by-step explanation:

Let's simplify step-by-step.

7y−4(9/4y−6)

Distribute:

=7y+(−4)(9/4y)+(−4)(−6)

=7y+−9y+24

Combine Like Terms:

=7y+−9y+24

=(7y+−9y)+(24)

=−2y+24

So then we can find the probability like this:

And using the normal standard table or excel we got:

Step-by-step explanation:

For this case we can check if we can use the normal approximation for the proportion and we have this:

Then we can conclude that we can use the normal approximation. And we have this:

So the mean is given by:

And the deviation is given by:

And for this case we want to find this probability:

And we can use the z score given by:

And for this case the z score is:

So then we can find the probability like this:

And using the normal standard table or excel we got: