Ryan earned x number of dollars babysitting his little brother in July. His older brother, Mike, earned twice plus $5 what Ryan earned. Their sister, Stormy,
earned $10 less than two times of what Ryan earned. All together they earned
$255. How much did each of them earn?

PLS HEL!!!

What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.