Answer:
<em>D. y=-3x</em>
Step-by-step explanation:
<u>Direct Proportion</u>
A direct proportion is a relation between variables where their ratio is a constant value. This means that if y and x are proportional, then:
Where k is the constant of proportionality.
Solving for y:
y=kx
The only choice representing a direct proportion is:
D. y=-3x
Consider these specific values of x.
For example, if x=10, then <span>C(10)=16(10)+36,000=160+36,000=36,160 (say $)
and R(10)=18*10=180.
So if only 10 units are produced, the total cost is 36,160, while the revenue is only 180 (again, say $.)
If, for example, x=1000, then we can calculate
</span><span>C(1000)=16*1000+36,000=16,000+36,000=52,000
and
R(1000)=18*1000=18,000.
This suggests that with higher values of x, we can get to a particular point where the Cost and Revenue are the same. To find this point, we set the equation:
C(x)=R(x),
which gives us that particular x at which both </span>C(x) and R(x) give the same value.
Thus, we solve <span>16x+36,000=18x. Subtracting 16x from both sides 2x=36,000, then x = 36,000/2=18,000.
Answer: 18,000
</span>
I'm not all that sure but hopefully this is right...
x=20+0.08x
36.25/5 = 7.25
The first digit of the quotient is in the ones. Paul is correct.
Remember
ou can do anything to an equaiotn as long as you do it to both sides
try to isolate variable and get 1 of it
-6+5b=6b-7
subtract 5b from both sides
-6=b-7
add 7
1=b
