Kendra’s work is shown in the table. where, if anywhere, did kendra first make a mistake? steps kendra’s work step 1 negative 3 x + 7 y = negative 15. negative 2 x minus 7 y = 5. negative 5 x = negative 10. step 2 negative 5 x = negative 10. x = 2. step 3 negative 3 (2) + 7 y = negative 15. negative 6 + 7 y = negative 15. 7 y = negative 9. y = negative startfraction 9 over 7 endfraction = negative 1 and startfraction 2 over 7 endfraction

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Which of the following lines does not intersect the line y=-2x+3 ? a) y=2x b) y=2x-3 c) y=2x+3 d) y=-2x-3

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?