School Rules
The three rules of the school
Be safe, be responsible, be respectful
Entering the room
Any of the following is acceptable:
- Check the front table
- Enter on level zero to your seat
- Read the front board
- Take out necessary supplies
- Backpack under the desk
Is (1,4) a solution to this system of equations?
y=x+9
y=10x+7
no
Solve using substitution.
–4x − y = 16
y = –8
(_,_)
(-2,-8)
–4x − 4y = 12
–2x − 4y = 2
(_,_)
(-5,2)
Class dismissal
Pack up belongings
Wait until called to leave
Where are phones supposed to be?
Powered off and in our backpacks
Is (6,7) a solution to this system of equations?
yes
Solve using substitution.
x = 2
6x − y = 5
(_,_)
(2,7)
2x − 2y = 2
10x − 9y = 18
(_,_)
(9,8)
Fire drill behavior
Walking quietly and in a straight line to the sidewalk in front of JUST
Leaving the Classroom
- Only one student out at a time
- Raise your hand for permission
- Sign out/in at the door
- No leaving first/last 10 minutes
Is (1,1) a solution to this system of equations?
yes
Solve using substitution.
y = 8x − 6
y = 7x − 4
(_,_)
(2,10)
x + 3y = –9
–3x − 2y = –15
(_,_)
(9,-6)
Lock down behavior
- Cover door
- Chair in door handle
- In back corner by phone
- Level zero
Pencil Sharpening
Ask permission for use during instruction and assessments. Other than that, you may use at any time.
Is (1,7) a solution to this system of equations?
y=5x+5
y=6x+1
no
3x + 2y = 18
x + y = 5
(_,_)
(8,-3)
–7x − 9y = 16
–3x − 7y = –12
(_,_)
(-10,6)
Dress code
black/tan bottoms, white, gold, or black polo
At the end of class on computers we do what?
Log off, then shut down
Mrs. Howell is researching what it would cost to order flower arrangements for a fancy party. She wants one large centerpiece for the head table, and smaller arrangements for the smaller tables. Vindale Florist charges $25 for each smaller arrangement, plus $30 for the large centerpiece. Isabella's Flowers, in contrast, charges $40 for the large centerpiece and $20 per arrangement for the rest. If Mrs. Howell orders a certain number of small arrangements, the cost will be the same at either flower shop. How many small arrangements would that be?
2 arrangements
Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.
Two sisters have decided to watch all the episodes of a popular TV show. Rebecca has already watched 12 episodes and will continue to watch the show at a rate of 1 episode per day. Sarah, who hasn't yet seen the show, will start watching 3 episodes per day. Once the two sisters get to the point where they have watched the same number of episodes, they plan to finish the series together. How long will that take? How many episodes will each sister have watched at that point?
In __ days, the sisters will each have watched ___ episodes of the show.
Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks.
Kendall is thinking of two numbers. Adding 8 times the first number and 9 times the second number gives a total of -13. Also, adding 7 times the first number and 7 times the second number gives -7. What are the two numbers?
The first number is __, and the second number is __.