Answer:
85.7
Step-by-step explanation:
Given that two sections of a class took the same quiz. Section A had 15 students who had a mean score of 80, and Section B had 20 students who had a mean score of 90.
Section A total score = 15*80=1200
Section B total score 20*90 = 1800
Overall total score=3000
Overall total students = 15+20 =35
Hence overall mean =
rounding off to one decimal place
overall mean = 85.7
Answer:
9.
10.
Exaplanation:
<em>Please refer to my Answer from this question to know more about the slope of a line: <u>brainly.com/question/24599351</u></em>
In graph 9, we can see a line that is perfectly horizontal. Graphs of lines that are horizontal has a slope of, .
If you want we can still solve for the slope of the line in graph 9, without acknowledging that the line is horizontal.
In graph 9, we can see that the points, and , is on the line. These can be our points and .
In graph 10, we can see that the points, and , is on the line. These can be our points and .
Is there supposed to be a picture i don’t see one
<h3>Given</h3>
- room height is x feet
- room length is 3x feet
- room width is 3x feet
- a door 3 ft wide by 7 ft tall
<h3>Find</h3>
- The net area of the wall, excluding the door
<h3>Solution</h3>
The area of the wall, including the door, is the room perimeter multiplied by the height of the room. The room perimeter is the sum of the lengths of the four walls.
... gross wall area = (3x +3x +3x +3x)·x = 12x²
The area of the door is the product of its height and width.
... door area = (7 t)×(3 ft) = 21 ft²
Then the net wall area, exclusive of the door is ...
... net wall area = gross wall area - door area
... net wall area = 12x² -21 . . . . square feet
If f(x)=3x∧3 and g(x)=-2x∧2 then
F(g(x))= 3(-2x∧2)∧3 = - 3*8*x∧6= - 24x∧6
The correct answer is B.
Good luck!!!