Rahul simplified an expression. his work is shown below.
7(8.5-1.5)+8divided by2
step 1. 7(7)+8 divided by 2
step 2. 49+8 divided 2
step 3. 57 divided by 2
step 4. 28.5
where did rahul make his first mistake?

Combined megan and kelly worked 60 hours.kelly worked twice as many hours as megan.how many hours did they each worked?

∠aed is formed inside a circle by two intersecting chords. if minor arc bd = 70 and minor arc ac = 180, what is the measure of ∠ aed? a) 45° b) 50° c) 55° d) 60°

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours