PLEASE HELP! Bob's Bricks has determined that a brick measuring 5 inches long has a z-score of +1 and a brick measuring 5.75 inches long has a z-score of +2.

What is the mean length of the bricks produced at Bob's Bricks?

A.4.00 inches
B. 4.25 inches
C. 4.75 inches
D. 5.25 inches

First, let's calculate the standard deviation of the bricks.

Standard deviation = 5.75 - 5 = 0.75

Now, we need to use the z-score formula to calculate the mean.

z-score = (observed value - mean) / standard deviation.

Let's plug our values into the formula above.

1 = (5 - mean) / 0.75

Multiply both sides by 0.75

0.75 = 5 - mean

Subtract 5 from both sides.

-4.25 = -mean

Divide both sides by -1

4.25 inches = mean

rx and sx

step-by-step explanation: