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a cell phone company has offered you two different rates. The first rate is $35 per month and 5 cents per phone call (time does not matter). The second offer is $55 per month and 2 cents per call. Set up the inequality to model this problem and find where it is less expensive to go with the second plan.
asked Feb 20, 2011 in Algebra 1 Answers by supemom1 (280 points)

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35 Answers

first scheme's cost is 35+0.05t (where t is number of calls)

second is 55 + 0.02t

for second plan to be less expensive

it's 55 + 0.02t < 35 + 0.05 t

or  0.03t > 20

t > 666

in other words, if you make more than 666 calls the second plan will cost you less
answered Mar 7, 2011 by HenryYang Level 3 User (2,140 points)

What are the steps of the order of operations? Why is it important that you follow the steps rather than solve the problem from left to right?


- Write an expression for your classmates to simplify using at least three of the following:

o Groupings: Parenthesis, brackets, or braces
o Exponents
o Multiplication or division
o Addition or subtraction


- Consider participating in the discussion by simplifying a classmate’s expression, showing how the expression would be incorrectly simplified if computed from left to right, or challenging the class with a complicated expression. Respond to your initial post and provide your classmates with the answer to your expression. 


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f+g = (x - 4) + (x2 - y)

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