Tom wants to buy some protein bars and magazines for a trip he has decided to buy three times as many protein bars with magazines each protein bar cost $.70 and each magazine cost $2.50 the sales tax rate on both types of these items are 6.5% how many of each item can he buy if he has $20 to spend

12 Protein bar and 3 magazines

Step-by-step explanation:

Given

Tom purchases Protein bars 3 times as much as magazine

Each bar cost  

Each magazine costs

Sales tax is 6.5 %

suppose Tom buy x magazines so

Price of magazine is

Price of bars is

Total Price

After sales tax

This must be less than

so

thus

so he but 4 magazines and 12 protein bars

yes. we do proportions in probabilities.

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17