You find out what you have to do to get three then one and so on
Answer:
D
Step-by-step explanation:
Since both equations express y in terms of x, equate the right sides
- 2x + 11 = - 3x + 21 ( add 3x to both sides )
x + 11 = 21 ( subtract 11 from both sides )
x = 10
substitute x = 10 into either of the 2 equations for y
y = - 2x + 11 = - 20 + 11 = - 9
solution is (10, - 9) → D
A) every 50 students is 1 representative, so:
r = (a+b+c+d+e)/50
b) (1587 + 985 + 2052 + 824 + 752)/50 = 6200/50 = 124 representatives.
Our answer makes sense since for every representative, there are 50 students. And 50*124 = 6200 total students.