Answer:
6:30
Step-by-step explanation:
20+16+6= 42
72-42=30
there are 30 rocks that are slate
There are 96 possible combinations.
The fundamental counting principle states that the number of total options is given by multiplying the number of possibilities for each option, or
Total choices = choices x choices x ...
4*3*8 = 96
Answer:
(b) It is symmetrical about 
Step-by-step explanation:
Given
See attachment for options
Required
True statement about the graph
First, we check the line of symmetric
Expand
Open bracket
A quadratic equation 
has the following line of symmetry
By comparison, the equation becomes:
Hence, the line of symmetry is at:
(b) is true.
The second option!! the addition one :))
Answer: We have many options:
1) 15 artists, with 2 paintings per artist.
2) 10 artists, with 3 paintings per artist.
3) 6 artists, with 5 paintings per artist.
4) 5 artists, with 6 paintings per artist.
5) 3 artists, with 10 paintings per artist.
6) 2 artists, with 15 paintings per artist.
by different artists, then the number of artists must be more than 1.
each artist shows more than 1 painting: >1 painting/artist
(30 oil paintings)/(2 paintings/artist)=15 artists
(30 oil paintings)/(3 paintings/artist)=10 artists
(30 oil paintings)/(5 paintings/artist)=6 artists
(30 oil paintings)/(6 paintings/artist)=5 artists
(30 oil paintings)/(10 paintings/artist)=3 artists
(30 oil paintings)/(15 paintings/artist)=2 artists
