The following histogram presents the amounts of silver (in parts per million) found in a sample of rocks. One rectangle from the

Response:

Monomial

Trinomial

Monomial

Trinomial

Binomial

Explanation in detail:

A monomial consists of one distinct term

A binomial consists of two distinct terms

A trinomial consists of three distinct terms

In the first example, the -x^2 and +x^2 cancel each other, and since 2x and 4x are similar terms, combining gives you 6x, which is a monomial.

In the second example, after adding +3 and -2, you get three distinct terms that can't be combined, thus it's a trinomial

In the third example, all variables cancel out, resulting in just one term, 3, making it a monomial

In the fourth one, after combining like terms, you end up with:

x^3 + 3x^2 + 7x

This makes it a trinomial

In the last example, the 6x and -6x cancel, leaving two terms, qualifying it as a binomial.

Answer:

The original cost amounts to $10

Step-by-step explanation:

Let us denote the cost as x

where Price = x + (0.5x) = 1.50x

Now, the price after reduction is 20% of 1.50x

which is 0.3x

thus, the cost is $10