Vir calculates that an object will take 2.3 seconds to fall to the ground. when vir times the object falling, it takes 2.5 seconds. what is vir's percent error ?

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?

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1