How do i solve this pls​

Students are given 3 minutes to complete each multiple-choice question on a test and 8 minutes for each free-responsequestion. there are 15 questions on the test and the students have been given 55 minutes to complete itwhich value could replace x in the table? 5507-m23-m8(15-m)8(15)-m

Which of the following vectors are orthogonal to (2,1)? check all that apply

Add. express your answer in simplest form. 12 9/10+2 2/3 = i need u guys to me find the answer to this question