Transcript Document

th
7
Grade MATH
Week of 12/15
Monday : Bell Work

Study quietly by yourself for the test.

We will begin in a few minutes.

You may show work on the test. Put your answers
on the bubble sheet.

When done- You may read or complete work but you
must BE QUIET!!
Tuesday : Bell Work

Use percent of change to answer this problem

Show your work

If the price of a purse increased from $45 to
$54, what was the percent of increase?
Agenda
• 1- bell work
• 2- Agenda
• 3- Objective
• 4- lesson *Simple Interest
• 5- exit ticket
Lesson objective

7. RP.3 Use proportional relationships to
solve multistep ratio and percent problems.
Simple Interest Lesson 6-7



Interest is the amount of money that is
charged for borrowing or using money.
Simple Interest is money paid only on
the principal.
Principal is the amount of money
deposited or borrowed.
Simple Interest Lesson 6-7
It does matter which letters are capital and lower case!!
Pay careful attention.
Simple Interest Lesson 6-7

Units of Measure

I=$
P= $
r= %
t= years



Example
Textbook p. 364

Let’s look at #1

I=

Formula: I = Prt (I party)


, P = $300, r = 4%, t = 2 years
I = 300 x 4% x 2
I = $ 24
Textbook p. 364

Let’s look at #3

I = $120, P =

Formula: I = Prt (I party)




120 = P x 6% x 5
120 = P x 0.3
0.3
0.3
$400 = P
, r = 6%, t = 5 years
Exit Ticket

Partner Discussion:

When would you interest in real life?
Wednesday: Bell Work

Use percent of change to answer this problem

Show your work

A DVD movie originally cost $24.99. Its
current price is $19.99. What is the percent of
change rounded to the nearest percent?
Benchmark Review

The benchmark tested 10 skills.
Skills










1) Spi 0706.1.1
2) Spi 0706.2.1
3) Spi 0706.2.2
4) Spi 0706.2.5
5) Spi 0706.2.7
6) Spi 0706.3.1
7) Spi 0706.3.5
8) Spi 0706.3.6
9) Spi 0706.3.7
10) Spi 0706.3.8
questions
questions
questions
questions
questions
questions
questions
questions
questions
questions
19, 20
5, 6, 7
1, 2
3, 4, 26
25, 27
8, 9, 10
21, 22, 23, 24
11, 12, 13
14, 15, 16
17, 18
Spi 0706.1.1
questions 19, 20
use proportions to solve problems












19. A recipe for making 5 cups of soup requires 4 cups of water. At this rate, how
many cups of water are required to
make 40 cups of soup?
A. 8 cups
B. 20 cups
C. 32 cups
D. 50 cups
20. A 8 ounce bag of trail mix contains 5 ounces of peanuts. At the same rate, how
many ounces of peanuts would be
contained in a 20 ounce bag of trail mix?
E. 40
F. 32
G. 12.5
H. 2.5
Spi 0706.2.1
questions 5, 6, 7
simply expressions w/ rational #s
Spi 0706.2.2
questions 1, 2
compare rational #’s w/ inequalities
Spi 0706.2.5
questions 3, 4, 26
contextual problems w/ integers





3. The temperature at 9:00 a.m. was –6°C.
The temperature increased 10°C between 9:00
a.m. and noon, but thendropped 7°C by 6:00
p.m. What was the temperature at 6:00 p.m.?
A. –9°C
B. –3°C
C. 11°C
D. 23°C











4. The temperature in San Diego was 71°F, while the temperature in Chicago was
¯12°F. How many degrees warmer was it in San Diego than in Chicago?
E. 59ºF
F. 61ºF
G. 69ºF
H. 83ºF
26. A department store is having a sale. Skirts are on sale for 20% off the original
price, p. Which equation could be used
to find s, the sale price of a skirt?
E. s = 0.20p
F. s = p – p / 20
G. s = p – 0.20
H. s = p – 0.20p
Spi 0706.2.7
questions 25, 27
use proportions to solve problems
27. It took a race car driver 3 hours and 15 minutes to go 500 miles. What was
his mean rate of speed, to the nearest tenth
of a mile per hour?
A. 142.9 mph
B. 153.8 mph
C. 158.7 mph
D. 166.7 mph
Spi 0706.3.1
questions 8, 9, 10
evaluate algebraic expressions










8. If r = 3 and s = –6, what is the value of the expression 8r + 3s?
E. –39
F. –6
G. 6
H. 39
9. What is 12m2 when m = 4?
A. 28
B. 96
C. 192
D. 2304





10. If x = –1.17 and y = –0.4, what is the value
of the expression –3x + 1.5y?
E. –4.11
F. –2.91
G. 2.91
H. 4.11
Spi 0706.3.5 questions 21, 22, 23, 24
represent proportional relatinships






21.
Suki typed 245 words in 3 ½ minutes. What is
Suki’s typing rate?
A. 35 words per minute
B. 70 words per minute
C. 82 words per minute
D. 86 words per minute
**This problem will be taught next
quarter!!!

22. Which table has numbers which show a
proportional relationship between x and y?
E.
G.

F.

H.






23. The table below shows the amount of money
Sarah earns babysitting for different numbers of
hours.
Which equation best represents Sarah’s total earnings
for babysitting?
A. y = 5x
B. y = -5x + 20
C. y = 5x + 5
D. y = 5
Spi 0706.3.6
questions 11, 12, 13
solve linear equations










11. What is the value of n in the equation 4n + 4 = –32?
A. –9
B. –7
C. 7
D. 9
12. What value of x makes the following equation true?
E. 6
F. 8
G. 12
H. 24
Spi 0706.3.7
questions 14, 15, 16
translate between words and math





14. Which word phrase translates into the
algebraic expression 2(x + 2)?
E. two x increased by two
F. twice x increased by two
G. twice the sum of x and two
H. two times the product of x and two











15. A 1-ounce serving of cheddar cheese has 115 calories, which is 20
calories more than a 1-ounce serving of Swiss cheese. If s is the number of
calories in a 1-ounce serving of Swiss cheese, which of the following
equations best represents this situation?
A. 20s=115
B. s + 20 = 115
C. s – 115 = 20
D. s + 20 + 115 = 0
16. The cost of one movie ticket for an adult is 1.6 times the cost of a ticket
for a child. If a equals the cost of one adult
ticket and c equals the cost of one child ticket, which equation represents
the relationship between a and c?
E. a = 1.6c
F. c = 1.6a
G. 1.6 = a + c
H. 1.6 = a - c
Spi 0706.3.8 questions 17, 18
solve contextual problems w/ equations


17. Helga bought 7 vases of flowers. Each vase contains an
equal number of flowers. She also bought 6 single roses.
Altogther there are a total of 90 flowers. The equation below
can be used to find f, the number of flowers in each vase.
7f + 6 = 90





How many flowers are in each of the vases?
A. 13
B. 12
C. 7
D. 6
18. Tony is ordering T-shirts for Art Club. The shop charges a $50 printing fee
and $6 per shirt ordered. He sepnt $206
on the shirts. The equation blow can be used to find n, the number of t-shirts
ordered.
6n + 50 = 206
How many t-shirts were ordered?
E. 42
F. 26
G. 10
H. 4
Exit Ticket

What could you have done to improve your
grade on the benchmark?
Thursday: Bell Work

Use percent of change to answer this problem

Show your work

Mary decreased her time in the mile walk
from 30 minutes to 24 minutes. What was the
percent of decrease?
Exit Ticket

Have a great break!