Britney is solving a quadratic equation. her first

step is shown below.

problem: 3x^2– 8-10x = 3(2x + 3)

step 1: 3x2^2 - 10x - 8 = 6x + 9

which two properties did britney use to get to step

1?

i addition property of equality

ii. commutative property of addition

iii. multiplication property of equality

iv. distributive property of multiplication

over addition

1) i and ii

2) i and iv

3) ii and iii

4) ii and iv

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem

(x-5)1/2+5=2 what is possible solution of this equation

An expression for the average of x 2x and 3y