Let the two numbers be represented by x and y respectively.
Then x + y = 23, and x - y = 5.
Solve this system of linear equations for x and y. Start by rearranging them vertically:
x + y = 23
x - y = 5
--------------- Combining the two equations eliminates y:
2x = 28.
Then x = 14. If x = 14, then 14 + y = 23, and y = 9..
The solution is (14, 9); that is, x = 14 and y = 9.
in general:
if delta>0 the equation has 2 solutions
if delta=0 the equation has 1 solution
if delta<0 the equation doesn't have real solutions
here :
delta=-4n
if n>0=> delta<0 => c) never
Answer:
14, 336 newspapers
Step-by-step explanation:
If he delivers 2^10 newspapers every week that will be 1,024 newspapers. In 14 weeks he'll deliver:
1,024 × 14 = 14, 336 newspapers
To the nearest whole number it would be 1
W = 144. Evaluate the equations inside the parentheses. Which is 12 x 12 then evaluate that. Which equals, 144.
