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All the Reviews!!!!!!!!!!
TSW10 AL13
By: Sung Min Go&Lucy Konopkova
TSW 9 REVIEW TSW1-5
By Lucy and Sungmin
TSW1
• The selling price of a certain video is 7$
more than the price the store paid. If th
e selling price is 24$, find the price the
store paid
ANSWER: 17$
TSW2
• If you ate 3 of the 8 pizza slices and
you paid 3.30$ as your share of the c
ost, how much did the whole pizza co
st?
ANSWER: 8.80$
TSW3
• The sum of 3 numbers is 123. The se
cond number is 9 less than 2* the firs
t number. The third number is 6 more
than 3* the first number
ANSWER: 21, 33, 69
TSW4
• Computer center charges nonmember
s $5 per session. If you’re a member
which you have to pay $25 for memb
ership, it is 3$ per session. Write an e
quation showing what would be bette
r for you.
ANSWER: It is worth to become a member if you expect to
attend 13 or more sessions.
TSW5
• Rectangular package
length and girth=108in
l=36in
w=?
4x+36=108
x=18in
Practice TSW 6
45 students are taking Japanese.
Increase 3students per yr.
108 students are taking German.
Decrease 4 students per yr.
When will the number of students taking Japanese equal to
number taking German?
Solution
Number of
students
+
taking
Japanese.
45+3a=108-4a
45-108=-4a-3a
-63=-7a
7a=63
a=9.
Number of yrs
Number of
times number
students
=
of increase
taking
students per yr
German
Number of
yrs times
number of
decrease
students per
yr.
Algebraic.
Practice TSW 7
You are shopping for earrings. The sales tax is 6%. You
have a total of $19.11to spend. What’s your limit for the
earrings?
x+0.06x=19.11
1.06x=19.11
another way
19.11 x 0.94=17.963
x=19.11/1.06
x=18.028301…...round
Round
x=$18
$18.
$18.
Book’s way
Another way
Which I thin
k is correct
Practice TSW 8
I=prt. Find the interest rate ‘r’ for an investment
of $1500 ‘I’ that earned $54 ‘p’ in simple
interest in a yr ‘t’.
I=prt
r=?
r=I/pt
54/1500 x 1
=54/1500
=0.036 or 3.6%
Practice TSW 9
Solve the equation.
(-a+2)^2 = 11
a^2 -4a + 4 =11
a^2- 4a =11 – 4
a^2- 4a = 7
-3a^2 = 7
a= root3/-7
(a+b)^2=
a^2+2ab+b^2