you have a truck with two gas tanks. the volume of the larger tank is "8x2 + 2x − 1" in3 and the volume of the smaller tank is "7x2 − 2x + 1" in3. find a single expression that represents the capacity of both gas tanks combined.

a) 15x2

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

Which of these triangle pairs can be mapped to each other using two reflections?