Answer:
7x + 3y = - 1
x + y = - 3
Find what y (Or x, but make sure you find the same variable for both equations) is:
3y = - 7x - 1
y = - 7/3x - 1/3
y = - x - 3
Substitute:
- 7/3x - 1/3 = - x - 3
Solve for x (Or y, depending on which one you used):
4/3x = 2 2/3
x = 2
Plug x (Or y) into one of the equations:
2 + y = - 3
y = - 5
Answer: x = 2, y = -5
1080/2 216/1
Step-by-step explanation:
Divide 1080/2 by 5, and 216/1 by 10, and this is what I got
<u>to show how many tickets were sold:</u>
x = upper floor tickets
y = main floor tickets
x + y = 2000
<u>to show total amount of revenue:</u>
25x + 40y = 62,000
<u>Finding answer using both equations:</u>
multiply each side by 25
25x + 25y = 2000 × 25
25x + 25y = 50,000
-
-----------------------------------
15y = 12,000
^ this is column subtraction
<em>^ this column subtraction is done to isolate y so we can work with one value rather than 2</em>
divide each side by 15
12,000 ÷ 15 = 800
y = 800
x + 800 = 2000
x = 1200
Therefore 1200 upper-level tickets were sold
800 main floor tickets were sold
D) 3x
The difference of adjacent terms is ...
(-7x) -(-10x) = (-7+10)x = 3x . . . . the common difference
10, 11, 12, 13, 14, 15, 16
The natural numbers are 1, 2, 3, 4, ...
The natural numbers between 9 and 17 are 10, 11, 12, 13, 14, 15, 16.
Answer: 10, 11, 12, 13, 14, 15, 16
Answer: A 1 to 4
