Answer:
- 40 popcorns and 90 pretzels sold.
============
Let the number of popcorns is x and pretzels is y.
Set up equations:
- x + y = 130
- 2.5x + 2y = 280
Solve by elimination, multiply the first equation by 2 and subtract from the second equation:
- 2.5x + 2y - 2x - 2y = 280 - 2*130
- 0.5x = 280 - 260
- 0.5x = 20
- x = 20/0.5
- x = 40
Find y:
- 40 + y = 130
- y = 130 - 40
- y = 90
1. You have the function 
2. You know that 
with 
, because the division by zero is not defined. So , 
for 
where 
is a integer number.
3. Then, to find the domain of the function given in the problem, you must make 
Where 
is odd number.
4. Therefore:
5. Finally, the domain is: 
The answer is:
Answer:
Step-by-step explanation:
-3y = 4x +9
y= -3/4x -3
Answer:
The answer is 54 cubes.
Step-by-step explanation:
Answer:
The tube are similar in shape.
The height of the small tub is 5 cm.
The volume of the small tube is 150 cm3.
The volume of the large tub is 500 cm3.
Work out the height of the large tub.
Give your answer correct to 3 significant figures.
Step-by-step explanation: Hope this help(:
