Answer:
#19: x=3
#20: would be n=4 i think
Step-by-step explanation:
#19- there are 4 x's and 12 +1's so 4 into 12 is 3.
#20- well the answer that i got was 5 but 4 was closer to 5 so yea.
i sure hope this helps!
1 because 5/6 is almost a whole. It can't be 1/2 because it would have been 3/6. And it's not 2 because it should have been an improper faction
Answer:
3
Step by Step:
Subtract the tip ($6) from the total ($39)
11x=33
Then divide 33 by 11, leaving you with the value of x.
x=3
The lesson was 3 hours long.
Answer:

Step-by-step explanation:
Let the quadratic function be

We substitute
into the equation to obtain;


We substitute
to obtain;


We finally substitute
to obtain;


We put equation (2) into equation (1) to get;





We add equation (4) and (5) to get;



We put
into equation (5) to get;



The reqiured quadratic function is

X+ y = 44
x - y = 6
—————
2x = 50
x = 25
y = 44-x = 19