Chapter 7-8 Review Answers

Answersto Chap 7/8 Review Problems:

r. (-r,7)

z.[+,il \z z)

solns 9. (0,10) 8. infinite

3.(-r,-1)

t'r.

81 F

z

and$2.00/gal. 14. $1.80/gal.

18.(2x-3y)'0

t9

1 49

zo.

T.Nosotution

12.x> 4: y <3; y2lt+ t

I l. below

10.betow

13.2.5hrswalking,.5 hrsjogging

s. Gz6,3B)6.(6,8)

t6'16) ^(:,+)

2 , rtn,

15. -l25m6ns

,r.

b'ctld" 3

tU.

#

,r. --. LtSbz

Answersto Chap7/8 ReviewProblems:

r. ( - 1 , 7 )

, (:,:)

3 . (-r,-1 )

\L ../

-

8 . inf init es olns 9 . (0 ,1 0 )

n + y."

\16 16/

- ,+l

12.x> -6;

l l .bel ow

1 0 .b e l o w

1 3.2. 5hr swalk in g ,.5 h rsj o g g i n g

s. ( - 26,38) 6. ( 6,8)

f

1 4 . $ 1.80/galand . $2.00/gal .

18 .(2 x-3 'r.ty)" '

D "' .+

49

29.- 2-"' 27ns

y3Z; y> -)x+ 3

15. -125m6n"

,r .

7.Nos or uti on

b' c' od" 3

,U '

#

22 --'

*lgb2

Answersto Chap 7/8 Review Problems:

r (-1 , 7 )

2 ( ;,:)

8. infinitesolns 9. (0,10)

ts. (z-r-3v)'o

7' Nos or uti on

- [11' *) 12'x> 4; y 33; y21] '+Z

l1' below

l0' below

t3. 2.5hrswalking,.5 hrsjogging

r,

5' ( - 26' 38) 6' ( 6' 8)

3 . (-r,-r)

and$2.00/gal' 14. $1.80/gal.

15' -l25m6ne

b'c'!d" *

#

"'

tu'

#

"' #