Answer:
its the 4th answer
Step-by-step explanatio
i had a test with the same question, i promise its right :)
Answer:
c
Step-by-step explanation:
First, put each grade in terms of x. Most grades are compared to Sophomores, so I made that x
Freshmen = x + 10
Sophomores = x
Juniors = x + 20
Seniors = (x + 10) + 7 = x + 17
Then, the total number of students = 363, so we’ll make an equation that adds them all up in terms of x to equal 363
(x + 10) + x + (x + 20) + (x + 17) = 363
Combine like terms:
4x + 47 = 363
Subtract 47 from both sides:
4x = 316
Divide both sides by 4:
x = 79
The question was how many seniors there are. Seniors were x + 17, so 79 + 17 = 96
Are you looking for an explanation? That's all I can give. Let me give you an example. 5-5 is 0, right? Well, what is 5 plus -5? It's still 0! Cool, right? 10-5 is 5, and 10 plus -5 is also 5.
Using the Pythagorean therom.
81 + b^{2} = 196
b^{2} = 115
b =
Hope this helps!
