Sara is running for class president. Using a random sample of 20 people to represent the 256 students at school, 15 said they would vote for her. How many will likely vote for her?

7

step-by-step explanation:

umm im not really sure because i never had to do this

step-by-step explanation:

a and c

for infinitely many solutions we require both left and right sides to be equal

distribute and simplify

a

14 - 8x = 20 - 8x - 6 = 14 - 8x ← both sides equal so infinite solutions

b

6x - 54 = 6x - 54 + x = 7x - 54 ← not equal

c

4x + 16 = 4x + 10 + 6 = 4x + 16 ← both sides equal so infinite solutions

d

5x - 40 + 10 = 5x + 10

5x - 30 = 5x + 10 ← not equal

so mark-up is 0.4 multiplied by 180 = 72