CAN SOMEONE PLEASE HELP ME IN MATH I DON'T HAVE A TUTOR AND I REALLY NEED HELP WITH MY QUESTIONS

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

What is 1/3x5 on anuber line what does it look like on a number line

Which option identifies how kevin should proceed in the following scenario? four years ago kevin designed an mp3 player for young children. now that technology has changed, he would like to update his design to ensure that it encompasses cutting-edge techniques. by creating a third-angle projection of his ideas by designing an isometric projection of his new ideas by referring to past designs and illustrations of his original model by conferring with engineers who have improved upon similar devices