Algebra-1 Q2 Practice 2021-2022 Skyline_IB_Math_HS-Alg_312 Over the last 3 months, Janet exercised a total of 101 hours. She exercised 4 hours more during the second week than the first week. The third week, she exercised 3 hours less than the second week. 1. Part A Complete the equation that represents this situation, where f represents the number of hours Janet exercised during the first week. 101 = f+ 2. Part B How many hours did Janet exercise during the second week?

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction

a orange at the grocery store idk what other product that could be

irst, find the z score of a score of 80. this is given by the formula z = (x-u)/o, where x is the score, u is the mean, and o is the standard deviation. this gives

z = (80-78)/12 = 1/6 = .1667

now, find what percentile a z score of 1/6 correlates to in the normal distribution.

a z score of 1/6 = .1667 is equivalent to the 56.36th percentile of the distribution. so the probability a score is over this is 1-.5636 = .4364

the mean of a sample mean is equal to the original mean. however, the standard deviation of a sample mean is equal to the original standard deviation divided by the square root of n (sample size). so the new standard deviation is 12/sqrt(16) = 3.

the new z score is 80-78/3 = 2/3 = .667. this is equivalent to the 74.86th percentile. so the probability that the mean will be greater than this score is 1-.7486 = .2514.

hi there

the slope is 1/3.

this is because from the y-intercept, you go up one, and you go to the right three, to get to the next exact point on the graph. this is known at the “rise over run.”

p.s. (if you need it).your y-intercept is -2, because that is the point on the graph where the line crosses the y-axis.

hope that : )