Paul bought a student discount card for the bus. The card allows him to buy daily bus passes for $1.20. After one month, Paul bought 19 passes and spent a total of $28.80. How much did he spend on the student discount card?

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.

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?

7x^2-9x+5=0 find the discriminant and number of real solutions