Answer : the amount of sales tax charged is directly proportional to the amount of the purchase. anna pays $3.90 sales tax on a $60 purchase. what is the rate of the sales tax? what would the sales tax be on a $340 purchase?

6.5%

$22.10

Step-by-step explanation:

percent = part/whole * 100%

percent = $3.90/$60 * 100%

percent = 6.5%

The percent rate of the sales tax is 6.5%.

part = percent * whole

6.5% of $340 =

= 6.5% * $340

= 0.065 * $340

= $22.10

The tax on $340 is $22.10

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

this is false ^.^ lol