Answer:
Your answer is C: Usually Molly scored more points than Sabrina.
Answer:
You know you got one solution if when you solve your equation its not for example 5=5 because that's infinite solutions or 5=6 because that's no solution so one solution would be like y=5
The inequality would start out looking like this:

Now it's just a matter of solving the inequalities simultaneously. Get rid of the fraction by multiplying everything by 9:

Then distribute the 5 into the parenthesis:

Now add 160 everywhere:

and finally divide everything by 5:
-22<F<266
Irrational numbers cant be fraction and can be written as a decimal. An irrational number has Endless repeating numbers
Move the decimal 2 places to the left.