(I'm not totally sure but there may be someone else with a more accurate/correct answer.)
Here is what I got (Red represents my work, blue represents to follow which steps and highlighter represents what the answer is):
If you would like to calculate 4 * 1 1/5, you can do this using the following steps:
1 1/5 = 6/5
4 * 1 1/5 = 4 * 6/5 = 24/5 = 4 4/5
The correct result would be 4 4/5.
If that was not your question, please ask differently and I will try and answer your question. :)
When we ask you the domain of f, you need to search for a forbidden value ?
for example you can't divide by zero, so assume x was equal to seven.
Then you would have f(7) = 7 / 7-7 = 7 / 0 this would be impossible because you can't divide by zero, yes ?
Other than that everything works, so the answer is c : all real values of x such that x ≠ 7
Good Luck
1. One value of x for f(x)=-4 would be 0.
2. Should be 3.5 and -3.5 but I'm not sure
Answer: 3 red bricks and 4 grey bricks
<u>Step-by-step explanation:</u>
You have 17 kg total with weights of 3 kg and 2 kg.
Since 17 is an odd number, subtract one 3 kg weight to get an even #.
17 - 1(3 kg) = 14
14 ÷ 2 kg = 7
One 3 kg weight results in seven 2 kg weights = 8 total weights.
Since the given problem states that there are only seven weights, my guess was not correct.
Try Again:
Since we need and odd number of 3 kg weights, try three 3 kg weights
17 - 3(3 kg) = 8
8 ÷ 2 kg = 4
Three 3 kg weights and four 2 kg weights = 7 total weights. 
Note that this can be solved mathematically using a system of equations:
Weight: 3r + 2g = 17
Quantity: r + g = 7
