11. isosceles triangle (two same lengths and angles) 12. equilateral triangle (all same side lengths and angles)
Answer:
y = ¼(x-4)
Step-by-step explanation:
Before solving the question, let's look at one example,
- A is directly proportional to B means A∝B which also means A=kB where k is a constant.
In this case, y is directly proportional to (x-4) means that y∝(x-4) which can also mean that y=k(x-4).
Hence, to find the value of k, substitute x=16, y=3 into y=k(x-4),
3=k(16-4)
k=3/12
k=1/4
After that, substitute the k value into the equation,
<h3>y = ¼(x-4)</h3>
Answer:
Remember, the expansion of 
is 
, where 
.
Then,
Then, the coefficient of the term 
is 
a) since 6-k=2, then k=4. So the coefficient of 
is
b) since 6-k=5, then k=1. So, the coefficient of 
is
c) since 6-k=3, then k=3. So, the coefficient of 
is
4, there is 3 radii OA, OC and OB
2nd choice
5. there is one chord BC
first choice
6. 3 central angles:
AOC, AOB, BOC
first choice
