An electrician needs 3/10 of a roll of electrical wire to wire each room in a house. How many rooms can he wire with 1 4/5 rolls of wire?

6

Step-by-step explanation:

1 4/5 as improper fraction = 9/5

multiply 9/5 by 2 to get the denominator to 10

then 18/10  is then subtracted 18/10-3 to the numerator until 0

hence, the answer is 6.

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:

jwjwkwkwkkkdjebd b jdjejdndj he jenej