K-12 algebra 2. ! for a research project, students are asked to study how often students at an online high school look at social media while doing schoolwork. a) give an example of a question she could ask on her survey b) how could sofie select a simple random sample of students to take her survey? c) she gives out 80 surveys but receives only 32 completed surveys. what are the sample and population for sofies research? d) of the 32 students who completed surveys, 16 said they use social media while doing schoolwork. if sofie uses only the completed surveys, what conclusion could she make about the percent of all high school students who use social media while doing schoolwork?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

Given: ad¯¯¯¯¯ is an altitude. prove: ab2+ac2=cb2 right triangle a b c with right angle a. point d lies on side b c and segment a d is drawn. angle a d c is a right angle. drag and drop a reason into each box to correctly complete the two-column proof. statement reason ad¯¯¯¯¯ is an altitude, and ∠bac is a right angle. given ∠adb and ∠adc are right angles. definition of altitude ∠bac≅∠bda ? ∠bac≅∠adc ? ∠b≅∠b ? ∠c≅∠c reflexive property of congruence △abc∼△dba ? △abc∼△dac aa similarity postulate abbd=cbab ? ab2=(cb)(bd) cross multiply and simplify. acdc=cbac polygon similarity postulate ac2=(cb)(dc) cross multiply and simplify. ab2+ac2=ab2+(cb)(dc) addition property of equality ab2+ac2=(cb)(bd)+(cb)(dc) substitution property of equality ab2+ac2=(cb)(bd+dc) ? bd+dc=cb segment addition postulate ab2+ac2=cb2 substitution property of equality

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is