suppose that a classroom has 10 light bulbs. the probability that each individual light bulb works is 0.6. suppose that each light bulb works independently of the other light bulbs. what is the probability that all 10 of the light bulbs work?

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

Which of the following represents the length of a diagonal of this trapezoid?

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?