Question

Solve the system by substitution. Check your solution. A minus 1.2 b = negative 3. 0.2 b + 0.6 a = 12 a. (15, 15) c. (13, 12) b. (10, 12) d. (7, 9)

Answer 1

The answer is A. (15,15)

Explanation:

edge21

Answer 2

The answer to the question is -1.32

Explanation:

The first step will be to write out the equation that we are working with:

This equation is

`0.2b + 0.6a = 12`

The next step is to write out the values of the figures that we are substituting:

`a = -1.2 b=-3`

Substitution in mathematics can best be understood as "something being used in place of another thing". This means that wherever the first variable appears in an equation, the substituting values will replace it and multiply the number it is attached to.

In this case, we will replace the 'b' and the 'a' with the - 1.2 and - 3 respectively.

`0.2(-3) + 0.6(-1.2) = -1.32`