The domain cannot be 0, because then the bottom is 0
So domain is (-∞, 0) U (0, <span>∞)
That rules out B
The range cannot be 0, so the answer is C
The second one is A</span>
Please note that in such questions, the ":" stands for ratio which in turn stands for divide. Thus, the given expression which is:
will become:
.....(Equation 1)
Now, we know that 3.8 can be rewritten as
. Also, we know that the mixed fraction
can be re-written as:

Using the above two expressions in (Equation 1) we get:


Cross-multiplication gives:




Or c=0.25
Thus, we may write the value of c as either the decimal 0.25 or the fraction
.
Answer:
0.025
Step-by-step explanation:
your welcome
Step-by-step explanation:
Substitute the y in the 1st equation with the 2nd equation.
7x + 10(2x + 9) = 36
7x + 20x + 90 = 36
27x + 90 = 36
3x + 10 = 4
3x = -6
x = -2
So now we can find y.
y = 2x + 9 = 2(-2) + 9 = (-4) + 9 = 5.
So x = -2, y = 5.