Ihave a few questions for 50 points answer them truthfully and make sure you answer all of you 1) what is the sum of –18 and 12? a. –6 b. –12 c. 12 d. 6 2) evaluate: 9 – (–12) a. 3 b. 21 c. –3 d. –21 3) which number sentence is true? a. –2.0 + (–0.5) = 2.5 b. –4.5 + 6.5 = –2.0 c. 3.0 + (–0.5) = –2.5 d. 5.5 + (–2.5) = 3.0 4) which number sentence is true? a. –8.2 + (–4.1) = –4.1 b. –8.2 + (–4.1) = 4.1 c. –8.2 + (–4.1) = –12.3 d. –8.2 + (–4.1) = 12.3 5) evaluate: -9/5 - -9/5 a. 0 b. 2 c. 18/5 d. -18/5 you s much it me a

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