You had some money and then spent $7.49. Now you have $6.21. How much did you originally have?

Step-by-step explanation:

7.49+6.21= 13.70

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3