The point of elimination is to have one variable so example
3x + 2y = 4
7X + 3y = 5
1) Try to find a way to have one variable
7(3x + 2y = 4) ----> 21x + 14y = 28
-3(7x+ 3y = 5) -----> -21x -9y = -15
2) add
0 + 5y = 13
3) solve for the last variable
5y = 13
y = 13/5 = 2 3/5 = 2.8
4) Subsitute the variable to get the other one
3x + 2(2.8) = 4
3x + 5.6 = 4
3x = -1.6
x = 0.533333333 (continue)
The intersection would be 0.53 with a line above the 3 and 2.8. (0.5333 , 2.8)
Hope you understand!!
B. Step 1. 14x - 6 = 9
Step 2. 14x = 15
Answer: $32,625
Step-by-step explanation:
40,000-10,000 = 35,000 ---> how much is taxed
35,000 x .25 = 8,750 = income tax
45,000 - 8,750 = 36,250
36,250 x .1 = 3,625 ---> social security
45,000 (gross pay) - 8,750 (income tax) - 3,625 = 32, 625
For a sequence to be arithmetic, the difference between each value must be the same.
15, 22, 35, 46
22 - 15 = 7
35 - 22 = 13
7 does not equal 13, so there is no common difference.
If there is no common difference, the sequence is not arithmetic.
