Math inequality multiple choice question?

Question

The cost of a pizza is $12.50 plus $1.50 for each extra topping. If you have $20.00 to spend then the inequality that you could use to determine the number of extra toppings (n) you could buy is represented by the inequality

1) 1.50 + 12.50n < 20
2) 1.50 + 12.50n > 20
3) 12.50 + 1.50n < 20
4) 12.50 + 1.50n < 20

Messed up copying it. In number 1 and 3 the < is supposed to be underlined (lees then or equal to).

Answer 1

The cost of the pizza is $12.50 (with no extra toppings)
With 1 extra topping, the cost is $12.50 + $1.50
With 2 extra toppings, the cost is $12.50 + $1.50 * 2
With 3 extra toppings, the cost is $12.50 + $1.50 * 3
etc.
With n extra toppings, the cost is $12.50 + $1.50 * n

And you want the price to be *less than or equal to" $20 because that is all you have to spend, so the answer is:

3) 12.50 + 1.50n ≤ 20

*(I assume you meant to use ≤ and for #4 to be > 20)

Incidentally, you can buy anywhere from zero to 5 toppings...

Answer 2

Number 4 because..................... 12.50 is obvious, then you have 1.50(the accepted price per topping) times N, the number of toppings one would order. say that you had 3 toppings so 3x1.50= 4.50$+12.50$=17.00$ which does not surpass your 20 dollar limit, soo......

12.50 + 1.50n <20 is correct (number 4)

Answer 3

3) 12.50 + 1.50n < 20
4) 12.50 + 1.50n < 20


these are the same
I pick 3 and 4 because it says 12.50 plus, look at the answers that is what is says

Answer 4

#3 or #4

Answer 5

You must replacement the pairs of values into the inequalities and examine whether or not or now not the inequality is right: y >= -3x - two For (-one million, zero): zero >= -three(-one million) - two Simplify: zero >= three - two zero >= one million (fake, now not an answer) Repeat this procedure for the rest pairs of values.

Answer 6

answer 3 and 4 are both correct