Mariana had a $20 gift card to an online music store. she spent the entire amount on songs, which cost $1 each, and music videos, which cost $2 each. mariana bought five more songs than music videos. write and solve a system of equations to find the number of songs and the number of music videos mariana bought.

1. are the triangles similar and if so why? what is the value of x? show your work.

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?

What is the the greatest common factor ?