Solve a system of equation by elimination 1. 4x+5=21 4x-2y=14

2. 5x+4y=45 -5x4y=35

3. 4x+3y=-10. -4x+y=-30

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Segment an is an altitude of right δabc with a right angle at a. if ab = 2, squared 5 in and nc = 1 in, find bn, an, ac.

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality