This one's not too difficult, giving Brainliest and 40 points to whoever has the best answer Select all of the prime numbers.

15
2
8
31
1
13

15,2,31,13

Solution given:a number that is divisible only by itself and 1 (e.g. 2, 3, 5, 7, 11).

now

all prime numbers are:

15,2,31,13

2  and 31 are prime

15 and 8 are composite

1 is neither prime nor composite

Step-by-step explanation:

Prime numbers are only divisible by one and  themselves

15 = 5*3  composite

2 = prime

8 = 4*2  composite

31 = prime

1 neither prime nor composite

13= prime

11

step-by-step explanation:

32.50-7.50=25

225/25=11

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation: