The sum of two numbers:
x + y = 108
The difference of the same two numbers:
x - y = 78
We can use substitution to figure out x and y:
x - y = 78 can be changed to x = 78 + y
We can plug this into the first equation:
78 + y + y = 108
78 + 2y = 108
2y = 30
y = 15
Now solve for x using any of the two equations. I'll use the first equation since it's easier:
x + 15 = 108
x = 93
Answer:
becuae he couldent see sorry i had to do that
Pikachu is right.
Undetermined Coefficients (that we learn here) only work when f(x) is a polynomial, exponential, sine, cosine, or a linear combination of those.
And,
As we can see that the equation given is a Polynomial,
So, Pikachu is right.
Learn more about Polynomial:
https://brainly.in/question/3793499
#SPJ4
Answer:$378.95
Step-by-step explanation:
Change it all to fractions.
3/10 of her salary on rent
2/5 of her salary on entertainment
1/4 of her salary on living expenses.
Add them
3/10 + 2/5 + 1/4 = 6/20 + 8/20 + 5/20 = 19/20*S
(19/20)*S = 7200
S = 7200*20/19
------
She saved the remaining 1/20 of S = 7200/19
saved =~ $378.95
