Answer:
The domain of f(x) corresponds to the set of real numbers.
D f(x) ∈ ∀X; D f(x) ∈ R
Step-by-step explanation:
f(x)=X+18-3X-15
f(x)=-2X+3 (right line with negative slope)
This function exists for all values of X, so the domain corresponds to the set of real numbers.
D f(x) ∈ ∀X; D f(x) ∈ R
Answer:
Yes, because the slope of the line is closer to 0 than to 1, which indicates a strong association between the variables.
Step-by-step explanation:
The statement "<span>The rate of change of y with respect to x is inversely proportional to y^4" can be written mathematically as dy/dx = k/y^4
To solve the differential equation, we use variable saparable method.
y^4 dy = kdx
Integrating both sides gives,
y^5 / 5 = kx + A
y^5 = 5kx + 5A = Bx + C; where B = 5k and C = 5A
![y= \sqrt[5]{Bx+C}](https://tex.z-dn.net/?f=y%3D%20%5Csqrt%5B5%5D%7BBx%2BC%7D%20)
</span>
Let the number of hours be $x
Initial charges by Sanford's Plus = $125
Per hour charges = $165
Total cost of Sanford's Plus company = 125 + 165x
Initial charges by Quality Moving Company = $200
Per hour charges = $145
Total cost of Quality Moving Company = 200 + 145x
If either company were hired for hours, the total cost would be the same
125 + 165x = 200 + 145x
Add -125 on both sides
125 - 125 + 165x = 200 + 145x-125
165x = 75 + 145x
Add -145 on both sides
165x - 145x = 75
20x = 75
Divide both side by 20, to find the value of x
x = 75/20
x = 3.75 hours
Total cost of Sanford's Plus company = 125 + 165x
x = 12 hrs
Total cost of Sanford's Plus company = 125 + 165(12)
Total cost of Sanford's Plus company = 125 + 1980
Total cost of Sanford's Plus company = $2105
Answer:
Option c. 18 withdrawals is correct
Step-by-step explanation:
Gareth has to invest = $2,000
His local bank gives 2.2% annual interest and gives him the ability to make ATM withdrawals without any charges.
In an online savings gives 4.85% annual interest, but charges $3 every time he makes an ATM withdrawal.
Let us find the amount of interest earned from the local bank.
The amount of interest earned from Local Bank = 2.2% of 2000
=
× 2000
= 0.022 × 2000 = $44
The amount of interest earned from online savings = 4.85% of 2000
=
× 2000
= 0.0485 × 2000 = $97
As it is given that savings account has no ATM withdrawal charges but online savings account charge $3.00 per withdrawal.
so we need to make x withdrawals from both accounts such that:
97 - 3x = 44
Let us solve for x.
Upon subtracting 97 from both sides of or equation we will get,
97 - 97 - 3x = 44 - 97
3x = -53

x = 17.666 rounded to 18
Therefore, Gareth must make 18 ATM withdrawals every year for the local savings account to be a better deal than the online savings account.