notes over 1.4 do you feel like it’s hard getting everything working together? well start focusing...

Notes Over 1.4

Do you feel like it’s hard getting everything

working together?

Well start focusing on one thing at a time.

5 202 1 xxxy ;.

Notes Over 1.4Calculating the Value of a VariableCalculating the Value of a VariableFind the value of y for the given value of x.

10 1010 y5

2y

y5 2010

5 5

1 11034 2 xyx ;.


14 1415 y3

5y

4 1103 y

3 3

1143 y

4 175 3 xyx ;.


20 2021y7

3y

20 17 y

7 7

3 6 4 xxyx ;.


66y3 9

3y

3 6

33

y3

Notes Over 1.4Using an Equation with More than One VariableUsing an Equation with More than One Variable5. The cost is c = 5000 + 0.56x where x is the number of items produced. Solve the equation for x, then evaluate x when c = 8360.

50005000x560.5000c

560

5000

.

c

x

xc 5605000 .

560.560.

560

50008360

.

6000

Notes Over 1.4Using an Equation with More than One VariableUsing an Equation with More than One Variable6. At a delicatessen, ham costs $2.49 per pound and Swiss cheese costs $3.79 per pound. The customer has $9.50 to spend on 2 pounds of ham and some cheese. How much cheese can she purchase? Write an equation and solve it.

984. 984.524.s793.

191.s

h492.

793. 793.

s793. 509.984. 509793 .. s

lbs

rhAr 2 :for Solve 7 .

Notes Over 1.4Rewriting a Common FormulaRewriting a Common FormulaSolve for the indicated variable.

h

Ar

2

h2h2

lwhVw :for Solve 8.


lh

Vw

lhlh

4

3 :for Solve 9 h

bb.


4

3hb

4 4b4 h3

rtPPAt :for Solve 10 .


rP

PAt

rP rP PA rtP

PP

hbVh 2

3

1 :for Solve 11 .


2

3

b

Vh

2b2bV3 hb2

33

100012 :for Solve 12

xpx .


x

12p1000

x 1000 1000

1212

00012,px 100000012 ,

p1000

Notes Over 1.4

notes over 1.4 do you feel like it’s hard getting everything working together? well start focusing...

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