A satay restaurant sells two types of satay, beef satay
and chicken satay, each in small and large portions.
The cost of a small portion of an either satay is RM
x and the cost of large portion of a either satay is RM
On a particular morning, 20 small portions and 12
large portions of beef satay was sold, while for the
chicken satay, 30 small portions and 10 large
portions were sold. The total income from the sales
of the beef satay was RM 244 and that of the chicken
satay was RM 282. Find the cost for each satay
portion that was sold.
11.

answer: 21$

step-by-step explanation:

$42 / $14 = 3   (ratio 3: 1)

$7 x 3 = $21

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80