Question

a student submitted the following quiz grade the paper by marking each correct item with a check mark or incorrect item with an x correct any mistakes ( this is for practice assessment)

Answer 1

Answer:

-3x(4y - 10) = -12xy + 30 (Incorrect)

Explanations:

The given equation is:

-3x(4y - 10) = -12xy + 30

To know if the equation is correct, simplify the Left Hand Side and compare it to the Right Hand Side. If they are the same, then the equation is correct. If they are not, the equation is incorrect.

Right Hand Side = -12xy + 30

Left Hand Side = -3x(4y - 10)

Expand the expression by making -3x to multiply each of the terms in the bracket

Left Hand Side = -12xy + 30x

By observation, you will see that the Right Hand Side is not exactly equal to the Left Hand Side, therefore, the equation is incorrect.