Find the possible value or values of r in the quadratic equation r2 – 7r – 8 = 0.

a. r = 8, r = –1 b. r = 2/3, r = 5 c. r = –10, r = 3 d.

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

Write each of the following numerals in base 10. for base twelve, t and e represent the face values ten and eleven, respectively. 114 base 5 89t base 12

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?