Please help. It’s for an exam correct answer gets brainliest.

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)