Circle a is shown. secant w y intersects tangent z y at point y outside of the circle. secant w y intersects circle a at point x. arc x z is 105 degrees and arc w z is 175 degrees.
in the diagram of circle a, what is the measure of ∠xyz?

35°
70°
75°
140°

The two expressions below have the same value when rounded to the nearest hundredth. log5 b log9 48 what is the approximate value of log b to the nearest hundredth? 0.93 1.23 9.16 65.53

What is the lcm of 16 and 40 ? 24 and 40 ?

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?