Edgar and rebekah are surveying their neighbors about the community pool. their questions, written on the survey, are below: edgar: how many times do you visit the pool in a month? rebekah: did you visit the pool this month? who wrote a statistical question and why? rebekah, because there will be variability in the responses collected rebekah, because there can be only one answer to the question edgar, because every neighbor will give the same answer edgar, because every neighbor can give a different answer

The correct answer is letter D

2a - 5b = 1
3a + 5b = 14

Let's solve this system using elimination. Add the equations together to cancel the b-terms, then solve for a.

    2a - 5b = 1
   3a + 5b = 14
+
    5a - 0 = 15
         5a = 15
           a = 3

Next, plug 3 for a into either of the equations and solve for b.

  2a - 5b = 1
2(3) - 5b = 1
    6 - 5b = 1
       - 5b = -5
           b = 1

Lastly, check all work by plugging both values for their respective variables.

     2a - 5b = 1
2(3) - 5(1) = 1
         6 - 5 = 1  --  This is true

     3a + 5b = 14
3(3) + 5(1) = 14
         9 + 5 = 14  --  This is true

The solution to the system of equations is (3, 1).