This exam is an alternate
95 l)0j115 Exani # 2
October 30
P0111t5. Write all work.
Naiiie:
C/iaptcv
• (10
points)
Solve the systems
of linear equations
by any method.
(a)
J3x—2y
3+y
=—3
6
j
(x
-C
-\
-
z__
-z
II
/
1
-H
--C=
-
(b)
f2x+y
—4
18x—8
=80
—
C1iapi;c’r 5
2. (15
poilits)
Rewrite
each uxi)ressioii usilig oiìiy positive eXpOlleiltS all(1
SirIIl)lify.
)
_2x
3
(_2x
(
1
(a) )
(b)
v —3
c
v’
4
30
iOn
—
/
\\
v
3. (10 points) Perform the indicated operation and simplify
(a) [f2y 3x] [
y + 3x]
2
—
‘-I
-
(>K
()
•*
-
-
2
(b) (—2y + 3)(4y
—
y
+4)
2-
CE
72
-
1/
4. (15
Factor
2
30z
J)OilltS)
(a) 6z
3
—
-5
(b) 3
y +
ôy
—
12
--p; J
1O
eJ’
j
6
-
(c)
3
—
2x2
—
4x+8
24
(x
-
(N
‘
2
(N
)
t
fl
ç7
14 c>
(
cD
-
‘
Q
If
LD
1
o
L
D
a’,’
‘I
U
(L1
—
r’)
c)
Co
Th
S-
I
\
fl\
(ii,iiiiiia live
6. (5 points) Solve the
inequality.
16<—5x+1
7. (15
(a)
points) Given
f(x)
=
—
2, find
f(3)
(L) f(-3)
(c)
f(z+3)
-
(
1
-7
47
8. (5 l)OilitS) Graph (lie
-
c(iuatioli.
y
=
( + 4)
—
I
-
:
•
•
•
V
•
V
V
•
V
V
V
9. (5 points) Determine the equation of the line through the point (—3, —2)
and
perpendicular the line y
(
—
2.
-t
iAl
LI
—x
—
-
4
t1
IU. (5
)oiIlls)
1
Fiud the (hstalice
-
l)etWeell
the
)omts
1
(2, 8) and (—2, 3).
.
•1
Ii
i
11. Extra Credit The revenue R from selling x cat treats is R = 14.80x.
The cost C of producing x cat treats is C = 6.80x + 1000. For what
values of x will the cat treats produce a profit?
iti
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—
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<> ?2s