Show that: p =+1 mod 12 -1 P=+5 mod 12

In a math class, one of your 4 test scores is dropped. On the first three tests, you have the following scores: 78, 35, and 95. What score do you need on the next test for your average to be 75 (assuming you drop the lowest test score)?

only one question was explaind could you please do number 2

Please write the steps of this question and circle the answer so that I can understand. Please write the answer in an organized way if possible so that I can understand and identify the numbers. For each step, please specify which answer corresponds to which step. I appreciate your understanding. This question has several steps and I have sent you both pages. Please, if possible, write the step by step and circle the answer so that I don't get lost. Please tell me what the answer to each question is about.

I need help and answer key for 14 and 15

please can you now answer 3 and 4

Tom, Bill, Susan and Sandy went bowling. Toms' score was 132, Bills' score was 140, Susan scored 145 and Sandys' score was 128. What was the average score of all four bowlers?

Please finish the entire question; it has multiple parts.

Hey sorry it must have cut off but what would letter A be ?

A student needs to answer 20 out of 30 questions on a test. Find the number of ways the student can choose if the student must answer the first 8 questions on the test.