Answer:
you graph it
Step-by-step explanation:
put it in yo cal
The two combinations of two-digit numbers we could have would be 79 and 97. The only one of those that would round to 100 is 97. If we added another digit to the number, it would be over 100. The very smallest three digit number we could have with these two numbers in it would be 179; that would not round to 100. That means 97 must be our number.
EDIT: I copied the problem wrong
Line thru (-3,-5) and (6,1) in standard form.
Point point form for the line joining (a,b) and (c,d) is
(c-a)(y-b) = (d-b)(x-a)
(6 - -3)(y - -5) = (1 - -5)(x - - 3)
9(y + 5) = 6(x + 3)
9y + 45 = 6x + 18
27 = 6x - 9y
2x - 3y = 9
Ax + By = C
That satisfies the constraints,
A=2, B=-3, C=9
A+B+C=8
Answer: 8
Check: 2x - 3y = 9 thru (-3,-5) and (6,1)
2(-3)-3(-5)= -6 + 15 = 9 good
2(6) - 3(1) =12 - 3 = 9, good
The y-intercept is at (0, 3)
The slope is up one, over one.
The equation for this line would be
y = 1/1x + 3
which is equal to
y = x + 3
Hope this helps!