Awriter chargers $5 per word plus a startup fee of $50 per article. write an equation in standard form to represent the total cost, y of a project that is x words long

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters

This graph shows a portion of an odd function. use the graph to complete the table of values. x f(x) −2 −3 −4 −6 im sorry i cant get the graph up