I don’t know for sure if this is right but I got f(-3)=1.
f(-3)= -x - 2
f(-3)= -(-3) - 2
The 2 negatives cancel each other out and make a positive.
f(-3)= 3-2
f(-3)=1
If owners told the truth, then the probability is always the same: 0,45.
0,45*0,80 = 0,36
Supposing trust your kit only, then there was 0,8 probability for correct measurement, meaning there is 0,2 chance for incorrect measurement.
If incorrect measurement means displaying a result opposite then truth, then there is 0,2 probability for oil.
If incorrect measurement means displaying a random result (assuming distribution of correct (by fortune) or incorrect answers is 50-50), then there is 0,2*0,5 probability for oil. That is 0,1 probability for oil.
If somehow the answer you are looking for consists of believing the owners and the kit equally, then there are two options. You get both options by applying 0,45 chance to results from previous two cases.
First solution would be 0,2*0,45, that is 0,09 chance.
Second solution would be 0,1*0,45, that is 0,045 chance.
Since none of these answers matches any of given options, I am really interested in calculations by other people. Please do correct me if I made a mistake in my calculations.
Answer:
Area: 196
Perimeter: 56
Step-by-step explanation:
1. Pick a side for both length and height and count the distance between the two coordinates (for example VU and UT)
VU = 14
UT= 14
Also important to note here that you don't even need to count the distance for both because since it's a square, all the sides are the same. Only did this to make it easier to understand the next step.
2. Since it's a square, as I said before, all sides are the same. So, you can go ahead and mark WT and VW as 14 as well.
3. To get the area, use the formula base times height.
14 x 14 = 196
4. For perimeter, simply add up all the sides (or multiply 14 by 4 since all are the same)
14+14+14+14=56
Answer:
1. First equation is option B
2. Second equation is option C
3. Third equation is option E
4. Fourth equation no best option.
explanation:
Check the attachment for solution
