One red chip is equal in value to four white chips. One blue chip is equal in value to seven white chips. Therefore, two red chips and one blue chip would be equal in value to a white chips. Also, three red chips and two blue chips would be equal in value to b. white chips.​

two red chips and one blue would equal 15, three red chips and two blue would equal 26

Step-by-step explanation:

b) 36

step-by-step explanation:

18 times 2 is 36

whatever you can spend with $11.53 or under.

step-by-step explanation:

20 - 8.47 = 11.53. take away the money he used for lunch from the starting amount of 20.