Katie and margarita have $20 each to spend at students choice bookstore where all students receive a 20% discount they both want to purchase a copy of the same book which normally sells for 22.50 plus 10% sales tax to check if she has enough to purchase the book katie takes 20% of 22.5 and subtract that amount from the normal price she takes 10% of the discount to selling price and add to back to find the purchase amount. margarita takes 80% of the the normal purchase price and then computes 110% of the reduced price. is katie correct? is margarita correct? do they have enough money to purchase the book?

Both of them are correct. Margarita and Katie do have enough to purchase the books.

Step-by-step explanation:

Consider the provided information.

Katie and Margarita have $20 each to spend at students Choice bookstore where all students receive a 20% discount they both want to purchase a copy of the same book which normally sells for 22.50 plus 10% sales tax to check.

Katie takes 20% of 22.5 and subtract that amount from the normal price she takes 10% of the discount to selling price and add to back to find the purchase amount.

Let us find out whether Katie is correct or not.

She take 20% of 22.5 which is:

She subtract that amount from the normal price i.e = 22.5-4.5 = 18

She takes 10% of the discount to selling price:

And she add to back to find the purchase amount.

18 + 1.8 = 19.8

Which is the correct calculation.

Thus, Katie is correct.

Margarita takes 80% of the the normal purchase price and then computes 110% of the reduced price.

Let us find out whether Margarita is correct or not.

She take 80% of 22.5 which is:

Then she computes 110% of the reduced price.

Which is also the correct calculation.

Thus, Margarita is correct.

Both of them are correct. Margarita and Katie do have enough to purchase the books.

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14

d

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.