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

the forst and 3rd

step-by-step explanation:

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have