As tia solved the system of equations below, she transformed matrices at different steps during the process.

(see image attached)

in which order should the matrices be arranged when solving the system from start to finish?
a. i, iv, iii, ii
b. ii, iii, iv, i
c. ii, iv, i, iii
d. iv, ii, iii, i

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

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?

If you have the following equation, 2/3x+5/6-x=2-3/4x what would you multiply each term by to get rid of all the fractions