Answer:
a. f(x)=25+0.02x
b. 0 miles
Explanation:
The charges per week to rent a car =$25
There is an additional cost of $0.02 per mile.
Let the number of miles driven during the week = x
(a)The weekly cost, f o rent a car will be:
(b) If the weekly cost to rent the car was $25
f(x)=25
Substitution into f(x) derived above gives:
If the weekly cost was $25, the car was driven for 0 miles (was not driven at all).
Answer:
sorry but i'm in class right now
Answer:
x=8, y=25. As a point it's (8,25)
Step-by-step explanation:
here is the system:
y=x+17
y=3x+1
notice how both of the equations equal y. Therefore, we can substitute one expression as y in the other expression. (It'll equal y=y, which is a true statement)
so it'll be:
3x+1=x+17
subtract 1 from both sides
3x=x+16
subtract x from both sides
2x=16
divide by 2
x=8
now, substitute 8 as x into one of the equations and solve for y
let's take the first one for example
y=8+17
y=25
so the answer is x=8, y=25. As a point it's (8,25)
Hope this helps!
Let Mary Sue have m necklaces and Betty have b necklaces.
And they have 603 necklaces altogether, that is
m + b =603
And Mary Sue has 115 more necklaces than Betty, that is
m=b +115
Substituting this value in first equation we will get
b+115+b=603
Subtracting 115
2b= 488
b= 244
So Betty have 244 necklaces .
