¿Cuál es la suma de los ángulos 1 al 6 en este paralelogramo?

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

Measures of the angle of r, 31 s (x+4) t (3x+9)

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?