Im not sure but I think the correct answers are:
3. B
4. A
80, 50 times 9.90 is 495 and 80 times 5.30 is 424, 424 + 495 = 919
31 and 37 are the only prime numbers between 30 and 40.
There are 3.5 tons of bricks on the truck. Hope I helped and good luck!
The y-intercept of the line is +5
Y= mx + b
The b is a variable that indicates where the line will pass through on the y-axis