9 Weeks Test Review 8 TH GRADE. Simplify…if possible3 3 y + 2 y + y 2 + 5 + y.
Transcript of 9 Weeks Test Review 8 TH GRADE. Simplify…if possible3 3 y + 2 y + y 2 + 5 + y.
9 Weeks Test Review8TH GRADE
Simplify…if possible3
3y + 2y + y2 + 5 + y
Answer3
y2 + 6y + 5
Simplify…if possible4
3y2 + 2xy + 1 + 3x + y + 2x2
Answer4
not possible to simplify this expression, since none of the
terms are alike
Finding Area11
Susan’s apartment is shown at right.
Assuming that all rooms are rectangular, find the areas described below. All measurements are in feet.
Find the area of
her living room.
Answer11
15 · 18 = 270 ft2
Simplify…if possible5
3xy + 5x + 2 + 3y + x + 4
Answer5
3xy + 6x + 3y + 6
Think about Algebra Tiles…1
Suppose you put one of your x‑tiles and two unit tiles with another pile of three x‑tiles and five unit tiles.
What is in this new pile?
Write it as a sum.
Answer1
4x + 7
Simplify…if possible6
4m + 2mn + m2 + m + 3m2
Answer6
4m2 + 5m +2mn
Simplify…if possible7
8x2 + 3x − 13x2 + 10x2 − 25x − x
Answer7
5x2 − 23x
Algebra Tiles2
Suppose one person in your team has two x2‑tiles, three x‑tiles, and one unit tile on his desk and another person has one x2‑tile, five x‑tiles, and eight unit tiles on her desk.
You decide to put all of the tiles together on one desk.
What is the name for this new group of tiles?
Answer2
3x2 + 8x + 9
Simplify…if possible8
4x + 3y
Answer8
4x + 3y
Can’t be simplified because of different variables
Find the length of the missing side10
Answer10
7.5 in
Combine Like Terms9
20 + 3xy − 3 + 4y2 + 10 − 2y2
Answer9
2y2 + 3xy + 27
Finding Area12
Find the area of her entire apartment.
Answer12
28 · 23 = 644 ft2
Finding Perimeter13
Find the perimeter of the kitchen.
Answer13
52 feet
Patterns14
How does the pattern grow?
Answer14
It grows by two tiles each time.
Ordered Pairs15
What are the coordinates of the two points in Quadrant II?
Answer15
(–3, 1) and (–2, 3)
Reading a Table17
What can you tell Riley about his plant based on the data?
Answer17
It is growing faster as the days go by.
Ordered Pairs16
What are the coordinates of the two points in Quadrant IV?
Answer16
(2, –1) and (3, –2)
Substitution18
Answer18
11
Substitution19
Answer19
14
Substitution20
Answer20
10
Substitution21
2xy
x = 5 and y = −3
Answer21
−30
Total Bill…before tax26
Bo buys 3 flower pots. He has a coupon for $5 off his purchase at the store.
If each pot costs $8, how much is his total bill before tax?
Answer26
$19
Evaluate22
k − m if
k = 4 and m = −10
Answer22
14
Evaluate23
x2 + y2
if x = 7 and y = 5
Answer23
74
Making Equations28
International Phone Company charges a $3 flat rate plus $0.25 per minute for
each phone call between Bolivia and the United States.
If C represents cost and M represents minutes, make an equation to model
this situation.
Answer28
3.00 + .25m = C
Solve24
y = 2x +3
when x = 4,
what does y equal?
Answer24
14
Solve25
3 + k = t when t = 14
what does k equal?
Answer25
11
Making Change29
Fabian bought two football tickets to the football game at a cost of $12.50 each.
If he paid with two $20 bills, how much change will Fabian receive?
Answer29
$15.00
Analyze this expression27
8x – 3(x+4)What is the simplified
form of this expression?
Answer27
5x - 12