Yusuf tried to solve an equation step by step. 1 4 r + 2 = 10 1 4 r = 12 Step 1 r = 48 Step 2 4 1 r+2 4 1 r r =10 =12 =48 Step 1 Step 2 Find Yusuf's mistake. Choose 1 Choose 1 (Choice A) A Step 1 Step 1start color #28ae7b, start text, S, t, e, p, space, end text, 1, end color #28ae7b (Choice B) B Step 2 Step 2start color #6495ed, start text, S, t, e, p, space, end text, 2, end color #6495ed (Choice C) C Yusuf did not make a mistake.

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.