Multiple Choice: Write the letter of the correct answer on the space provided for. 1. What does FOIL stand for in multiplying binomials?
a. First, Outer, Inner, Lower
b. Fair, Operation, Inside, Later
C. First, Outer, Inner. Last
d. It doesn't stand for anything.
2. Find the product of (5x - 3)(4x-6).
a. 20x2 + 42x + 18 c. 20x2 + 42x - 18
b. 20x2 - 42x + 18 d. 20x2 - 42x - 18
3. What is the constant term of (x - 5)2 when expanded?
a. 25
b.-5
d. -25
C. 5
4. The cube of (y + 2) is equal to
a. y + y + y +8 C. y + 12y + 6y +8
b. y + 6y2 + 12y +8
d. y + y2 + 9y +8
5. Which of the following is the expanded form of (m - 1)?
a. (m - 1)(m-1)
c. m - 3m - 3
b. m - 1
d. (m - 1)(m - 1)(m - 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