x = 3
2x + y - z = 3 → (1)
- x + y + 2z = 0 → (2)
3x + 2y + z = 9 → (3)
we require to eliminate the y and z terms from the equations
(1) + (3) : 5x + 3y = 12 → (4)
multiply (1) by 2
4x +2y - 2z = 6 → (5)
(2) + (5) : 3x + 3y = 6 → (6)
(4) - (6) : 2x = 6 ⇒ x = 3
Answer:
s=salary
x=sales
s ≥ 4,000 + .06x
Step-by-step explanation:
Answer:
As per the statement:
Mr. Roseanne will buy
pounds beef for for a cookout.
⇒ Weight of the beef he buy =
pounds.
It is given that:
The price for the first 3 pounds of beef is $4.99 per pound.
then;
the price for 3 pounds he will pay= 
After that, the price is $4.49 per pound.
Remaining weight of beef left =
pounds.
then;
the price of
pounds he will pay = 
now, total money he will pay for the
pounds beef = 
Therefore, $57.625 will Mr. Roseanne pay for the beef
Equation for this problem: Total 3 cubed / (L x W)
So 18.5cm x 15cm = 277.5 is the product of L and W. Now you need to devide the total by 277.5 which is 14. So the aquarium is 14 cm deep.
Answer:
$27.59
Step-by-step explanation:
1) First we calculate the sales tax:
30 x .15 = 4.5
30 - 4.5 = 25.5
2) Now we calculate sales tax
25.5 x .082 = 2.09
25.5 + 2.09 = $27.59