At the gift shop, they sell small greeting cards and large greeting cards. The cost of a small greeting card is $1.90 and the cost of a large greeting card is $4.95. How much would it cost to get 3 small greeting cards and 2 large greeting cards? How much would it cost to get xx small greeting cards and yy large greeting cards? Total cost, 3 small greeting cards and 2 large greeting cards:
Total cost, xx small greeting cards and yy large greeting cards:

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?

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)