Answer:
B and D
Step-by-step explanation:
When you subtract a negative number, you are adding.
7-(-7)=7+7=14
Adding goes right on a number line.
For each problem, use the inscribed angle theorem.
19.

20.

21.

LN is a diameter, so arc LN has measure 180º, and so

A means an area
s side of the square, because of all sides are equal
then Area=s*s or Area=s²
so
A=9*9=81yd²
6. A-C
8. A-D
Thats all I know, sorry.
Two or zero expresses the possible number of positive real solutions for the given polynomial equation.
Answer: Option D
<u>Step-by-step explanation:</u>
Given equation:

First, we put hit and trial method to find out the one solution. So, if we put x=4 then the above expression will become zero. We can also write the above expression as

We know the formula,
, make use of this, we get

So, 
Hence, from the above expression, we have three values of x as x= 4, 2.64 and -2.64