Which equations are true? Select all that apply.
16x2 – 64y2 = (4x – 8y)(4x + 8y)
16x2 – 18y2 = (8x – 9y) (8x + 9y)
O 22 – 169 = (x – 13)(x + 13)
2522 – 12 = (5x – 6)(5x + 6)
9x2 – 1 = (3x - 1)(3x + 1)

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

Grant simplified the expression 1.5(-3.2 + 2.5) his work is shown below explain the error in grants work

Determine the third angle of a right triangle if in of the angles measures 24°. i need .