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1. A pre-paid cell phone company charges $13.35 as a monthly access fee and $0.18 per minute of calling time.   

What will the monthly cost be if you make 151 minutes of calls this month? 

NOTE: Round to two decimal places for your final answer.

 

2.The perimeter of a rectangle is 78 cm. If the length is 28 cm, how wide is the rectangle?
Find the width of the rectangle.

 

3.You are choosing between two different cell phone plans. The first plan charges a rate of 22 cents per minute. The second plan charges a monthly fee of $39.95 plus 9 cents per minute. 
Let t be the number of minutes you talk C 1 and C 2 be the costs (in dollars) of the first and second plans. Find the number of talk minutes that would produce the same cost for both plans 

NOTE: Round to two decimal places for your final answer.

If you talk for________________ minutes the two plans will have the same cost.

 

 

4.A rectangular room is 3 times as long as it is wide, and its perimeter is 48 meters. Find the dimensions of the room. 

The length is __________meters and the width is___________meters. 

 Jan 26, 2021
edited by monkeyree1124  Jan 26, 2021
 #1
avatar+116126 
+1

1.    13.35 + .18 (151)     = $40.53

 

 

cool cool cool

 Jan 26, 2021
 #2
avatar+116126 
+1

2.The perimeter of a rectangle is 78 cm. If the length is 28 cm, how wide is the rectangle?
Find the width of the rectangle.

 

Perimeter = 2 (W + L)

 

78  = 2 ( W  + 28)    divide  both sides  by  2

 

39  =  W +  28

 

39  - 28 = W   = 11

 

 

cool cool cool

 Jan 26, 2021
 #3
avatar+116126 
+1

3.You are choosing between two different cell phone plans. The first plan charges a rate of 22 cents per minute. The second plan charges a monthly fee of $39.95 plus 9 cents per minute. 
Let t be the number of minutes you talk C 1 and C 2 be the costs (in dollars) of the first and second plans. Find the number of talk minutes that would produce the same cost for both plans 

NOTE: Round to two decimal places for your final answer.

If you talk for________________ minutes the two plans will have the same cost.

 

 

 

3995 + 9t  = 22M

 

3995   =  22t  - 9M

 

3995 =  13t

 

t  =3995/13    ≈   307.3  minutes will  equalize the  cost

 

 

 

cool cool cool

 Jan 26, 2021
 #4
avatar+116126 
+1

4.A rectangular room is 3 times as long as it is wide, and its perimeter is 48 meters. Find the dimensions of the room. 

 

Note           3W  =   L

 

So

 

48  = 2 ( W + L)

 

48  =2  (  W +  3W)

 

48  = 2 (4W)

 

48   =  8W

 

W  =48/8 =    6  m

 

L = 3W  =  3 (6)  =  18 m

 

cool cool cool

 Jan 26, 2021

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