Answer:
60
Step-by-step explanation:
ingressos: 55 x 2 = 110
25 x 2= 50 Tax
110+50=160 total
160-100= 60
Answer:
2.987
Step-by-step explanation:
The mean is calculated by dividing the sum of the terms by the # of terms.
For this problem, add all of the terms together:
3.245 + 3.678 + 3.3 + 2.499 + 2.9 + 3.206 + 2.081 = 20.909
Now, divide the product by the number of terms there are. There are 7 terms.
20.909 ÷ 7 = 2.987
5x + y = 9....multiply by 7
10x - 7y = -18
----------------
35x + 7y = 63 (result of multiplying by 7)
10x - 7y = -18
----------------add
45x = 45
x = 45/45
x = 1
5x + y = 9
5(1) + y = 9
5 + y = 9
y = 9 - 5
y = 4
solution is : (1,4)
=========================
-4x + 9y = 9
x - 3y = -6 ....multiply by 4
----------------
-4x + 9y = 9
4x - 12y = -24 (result of multiplying by 4)
---------------add
- 3y = - 15
y = -15/-3
y = 5
x - 3y = -6
x - 3(5) = -6
x - 15 = -6
x = -6 + 15
x = 9
solution is : (9,5)
Answer:
$305
Step-by-step explanation:
4 tickets = $122 <-- divide by 4
1 ticket = $30.5 <-- multiply by 10
10 tickets = $305
Answer:
x=6
Step-by-step explanation:
Simplifying
3(2x + -8) = 12
Reorder the terms:
3(-8 + 2x) = 12
(-8 * 3 + 2x * 3) = 12
(-24 + 6x) = 12
Solving
-24 + 6x = 12
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '24' to each side of the equation.
-24 + 24 + 6x = 12 + 24
Combine like terms: -24 + 24 = 0
0 + 6x = 12 + 24
6x = 12 + 24
Combine like terms: 12 + 24 = 36
6x = 36
Divide each side by '6'.
x = 6
Simplifying
x = 6