Answer:
-a^2 - a + 12
Step-by-step explanation:
You only need to find the products of the first and last terms to determine the correct answer:
(-a)(a) = -a^2
(3)(4) = 12
You're looking for an expression with -1 as the leading coefficient and +12 as the constant. There is only one choice like that:
-a^2 - a + 12
The answer is 1.75
because the cost on the y axis goes by fourths
2 green spaces, 2 star spaces, 2 question mark spaces
96 messages .... $4.80
155 messages .... x
x= (155x4.80):96=7.75
