Please help me i need help isats are tomorrow!!!!!!!?

1. roller blades can be rented for $5/hr. + $3 for laces and socks. the equation y=5x+3 describes the cost of renting roller blades. how many hours can you rent the skates if u spend $18?





2. michelle traveled to chicago from pittsburgh . she biked the 1st 100 mi. and then drove a car 65mi/h. the rest of the way. if the equation y=65x+100 represents the distance micheele traveled by car what is the y-intercept of the graph of this function?





3. set A contains: 1,6,7,2,5,4


set B contains: 2,8,5,9,3





A upside-down U b {2,_}





please help me ISATs are tomorrow and i need help

Please help me i need help isats are tomorrow!!!!!!!?
1. roller blades can be rented for $5/hr. + $3 for laces and socks. the equation y=5x+3 describes the cost of renting roller blades. how many hours can you rent the skates if u spend $18?





Okay...


We know that the amount spent (y) equals 5 dollars per hour, plus 3 dollars for laces and socks. Since they tell us that we spent 18 dollars (y=18), all we have to do is get the value of x (hours rented)





y=5x+3





We substitute 18 for y, so


18=5x+3





We now substract 3 on each side of the equation, so


18-3=5x+3-3 or,


15=5x





We now divide each side by 5 to leave the x alone, so


15/5 = 5x/5, or


3=x





The answer is 3. For 18 dollars, we can rent the skates for 3 hours.





Verify the problem by substituting the values we find:


y = 5x+3


18 = 5(3) +3


18 = 15 + 3


18 = 18.





2. michelle traveled to chicago from pittsburgh . she biked the 1st 100 mi. and then drove a car 65mi/h. the rest of the way. if the equation y=65x+100 represents the distance micheele traveled by car what is the y-intercept of the graph of this function?





For this one we make a table:





x y


1 65(1) +100 = 165


2 65(2) +100 = 230


3 65(3) +100 = 295


4 65(4) +100 = 360


5 65(5) +100 = 425





Now we plot a graph (which I do not know how to plot here)


but, you know, x versus y type of graph and plot the values.








3. set A contains: 1,6,7,2,5,4


set B contains: 2,8,5,9,3





A upside-down U b {2,_}





I need more info for this one. Make sure there is no typo here. I%26#039;ll check soon to see if you%26#039;ve written anything more.





Hope this helps!



finance