Let y be the difference of two numbers such that one number varies directly as x while the other number varies inversely as x. if y = –7 when x = –2, and y = 5 when x = 1, express y in terms of x. show your work.

Step-by-step explanation:

If y is directly proportional to x, then

where, a is constant of proportionality.

If y is inversely proportional to x, then

where, b is constant of proportionality.

It is given that y be the difference of two numbers such that one number varies directly as x while the other number varies inversely as x.

           ..... (1)

We have y=-7 at x=-2.

Multiply both sides by 2.

                 .... (2)

We have y=5 at x=1.

                .... (3)

Add equation (2) and (3).

Divide both sides by -3.

The value of a is 3.

Substitute a=3 in equation (3).

The value of b is -2.

Substitute a=3 and b=-2 in equation (1).

Therefore the required equation is .

figure c

step-by-step explanation:

hope this .

answer:

step-by-step explanation:

here, the total dishes = 10

dishes having meat = 3 ( chicken, meatloaf and hamburger )

thus, the probability of having meat on the chosen dishes = number of dishes having meat / total dishes

=

therefore, the probability of not having meat = 1- the probability of having meat on the chosen dishes

=

=

=

⇒ option b is correct.