1 4. A b la n k C D c a n h o ld 80 m i n o f m u s ic. Y o u h a v e
burned m m inutes of music onto the CD. W hich
equation models the am ount of tim e t t h a t is le f t o n
th e CD?
CD t = 80 - m CD t = 80 + m
CD t=m -80 CD t=80m
1 5. W h a t is a n e x p r e s s io n f o r t h e s a le p r ic e o f a s h ir t t h a t
is s o ld at 40% o ff th e o rig in a l p ric e p?
CD 0.4p CCC 0.4p - p
CD p + 0.4p CD p - 0.4p
1 6. A c lo c k o r ig in a lly c o s ts x d o lla rs. A ft e r y o u a p p ly a
$3 d is c o u n t t o a c lo c k t h a t c o s ts g r e a te r t h a n $3,
th e c lo c k c o s ts y d o l l a r s. W h i c h g r a p h m o d e l s t h i s
situation?
CD Q|y
o
cU >
A •(^7) L
X
O i i
CED A y
4
*7J
7
1
X
0 : l1
; l. y
nc
(^1) j
X
0
CD A y
4
J1
1
1
X
b!
Co n st r u ct ed Re sp o n se
1 9. U s e t h e g r a p h. W h a t is th e t o t a l c o s t, i n d o lla r s , f o r
8 bags o f b a llo o n s?
Balloon Cost
■oO
uo
(^11) i L[y
J
&
7
X
o\ i!
Number of Bags
- Cole has $15 to spend on notebooks. Each notebook
c o s ts $ 3 .9 9. W h a t is th e g re a te s t a m o u n t , i n d o lla r s ,
th a t C ole can spend on notebooks?
21. S im p lif y t h e e x p r e s s io n 3ab + 4ab - 5ab. W h a t is th e
coefficient of the sim plified expression?- U se m e n ta l m a th to fin d th e s o lu tio n o f th e e q u a tio n
At = 64. - A s t u d e n t r e c o r d e d th e te m p e r a t u r e c h a n g e o v e r t im e.
I h e t a b le b e lo w s h o w s th e re s u lts.
f im e (h) 0.0 0.5 1.0 1.5
Temperature (°F) 76 73 70 67
J
1 7. T o o r d e r m o v ie tic k e ts o n lin e , J o h n h a s to p a y $ 1 0 p e r
t ic k e t p lu s a $ 2 h a n d lin g fe e f o r t h e w h o le o rd e r. W h ic h
equation can be used to determ ine the total cost C f o r
t t i c k e t s?
CD C= 21+10 C D C = 1 0 f + 2
CD c = lot CD C=\2t- The m o n th ly cost C fo r a cell phone is $20 each m o n th
plus $.10 for each m inute used. W hich equation can
b e u s e d t o f i n d th e t o t a l c o s t ( i n d o lla r s ) f o r a m o n t h
when m minutes are used?
CD C=m + 20 CD C= 10 m+ 20
CD C= 0. 1 m + 20 CD C = 20 m
I f th e t e m p e r a t u r e c h a n g e c o n t in u e s a t t h e s a m e ra te ,
what w ill the temperature be 3 hours after the start?- T h e f o r m u la F = g C + 3 2 c h a n g e s a t e m p e r a t u r e
r e a d in g f r o m th e C e ls iu s s c a le C to th e F a h r e n h e it
s c a le F. W h a t is th e t e m p e r a t u r e m e a s u r e d i n d e g re e s
F a h r e n h e it w h e n t h e C e ls iu s t e m p e r a t u r e is - 5 ° C?
76 Ch ap t er 1 Co m m o n Co r e Cu m u l a t i v e St an d ar d s Re v i e w