5. solution.
Elena wanted to find the slope and y-intercept of the graph of 25x - 20y = 100. She
decided to put the equation in slope-intercept form first. Here is her work:
25x - 20y
20y = 100 - 25x
у
= 5 - 2x
= 100
She concluded that the slope is - and the y-intercept is (0,5).
a.
What was Elena's mistake?
b.
What are the slope and y-intercept of the line? Explain or show your reasoning.

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

If you could answer these your a life saver

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297