Question

Please help me!

Write and solve the compound inequality
A student scored a 73 and 81 on their first
two tests. Write and solve a compound
inequality to find the possible values for a
3rd quiz score that would give them an
average between 80 and 85
my answer is 86<=x<=101, but I don't know if it is right

Answer 1

Well, let's check if your inequality is true. We have to add the 3 scores up and divide them by 3 to know the average.

73 + 81 + 86 = 240
240 / 3 = 80

80%

That's true, now let's check 101.

73 + 81 + 101 = 255
255 / 3 = 85

85%

That's true.

Your inequality is correct.