Which of the following is an integer?
0.5
1
3/2

1

Step-by-step explanation:

Integers only include negative or positive numbers that do not have fractions or decimals. So, integers are whole. 0.5 and are decimals and fractions respectively - they are not whole. But 1 is. Thus, 1 is the answer.

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.