THIS IS THE THIRD PROBLEM I NEED HELP WITH

Is the orthocenter of a triangle on the inside ?

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?

Convert the number to decimal form. 12) 312five a) 82 b) 30 c) 410 d) 1560 13) 156eight a) 880 b) 96 c) 164 d) 110 14) 6715eight a) 53,720 b) 3533 c) 117 d) 152