Which expression is equivalent to16x2+81? 1. (4x−9i)2 2. (4x+9i)(2x+3i)(2x−3i) 3. (4x+9i)(4x−9i) 4. (4x+9i)2

Which statement about the relative areas of ? abc and ? xyz is true? the area of ? abc > the area of ? xyz the area of ? abc < the area of ? xyz the area of ? abc = the area of ? xyz more information is needed to compare.

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check