x + 2y = 9
x + 3y = 13
____________________________________________________________
Solve for x in the first equation. Subtract 2y from both sides.
x = 9 - 2y
____________________________________________________________
Plug x into the second equation.
(9 - 2y) + 3y = 13
Combine like terms.
9 + y = 13
Subtract 9 from both sides.
y = 4
____________________________________________________________
Plug y back into the first equation.
x + 2(4) = 9
x + 8 = 9
Subtract 8 from both sides.
x = 1
____________________________________________________________
x = 1
y = 4
Answer:
$99
Step-by-step explanation:
First, it was on sale for 10% off. 10% = 0.1 = 1/10. 1/10 of 100 is 10, so we subtract 10 (because 10% off) to get $90. Then, the sales tax, which we add, is 10%. 1/10 of 90 is 9, so we add 9 to 90 to get our total to be $99
Answer:
dP/dt = k*(600 - P)*P
Step-by-step explanation:
Given:
- Total number of people in company N = 6000
- Total people involved in bribery P
The rate at which people become involved in a corporate bribing scheme is jointly proportional to the number of people already involved and the number of people who are not yet involved.
Find:
Write a differential equation
Solution:
- The following differential equation can be used to describe the situation above:
Number of people not affected = N - P
- Hence we can write a differential equation:
dP/ dt = k *( N - P )*P
- input the value of N:
dP/dt = k*(600 - P)*P
