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tino4ka555 [31]
3 years ago
13

Verizon offers two billing plans for local calls. Plan 1 charges $30 per month for unlimited calls, and Plan 2 charges $11 per m

onth plus $0.04 per call. For how many monthly calls is Plan 1 more cost effective than Plan 2?​
Mathematics
1 answer:
rodikova [14]3 years ago
6 0

Answer:

Number of monthly calls = 475

Step-by-step explanation:

Given:

Plan 1 = $30 per month unlimited calls

Plan 2 = $11 + $0.04(per call)

Find:

Number of monthly calls, plan 1 better than plan 2

Computation:

Plan 1 (Cost) < Plan 2 (Cost)

30 < 11 + 0.04(x)

19 < 0.04(x)

475 < (x)

Number of monthly calls = 475

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3 years ago
What is the solution of 3x + 5 equals 2x - 7​
gregori [183]

Answer:

x=-12

Step-by-step explanation:

First subtract 2x on both sides. and you'll have x+5=-7.

Second subtract 5 on both sides, it will equal you x=-12

7 0
3 years ago
Four brothers have ages which are consecutive even integers. If the product of the ages of the two middle brothers is 528, how o
exis [7]

Answer:

The oldest brother is of age 26 years.

Step-by-step explanation:

As the age of four brothers are consecutive even integers.

We assume that the ages are x,(x+2),(x+4),(x+6) as their respective ages.

And the age of the youngest brother x yrs.

Age of the oldest brother (x+6) yrs.

According to the question

Product of two middle brother that is (x+2)(x+4) =528

So we will arrange this in our equation and solve the quadratic.

(x+2)(x+4) =528

x^{2}+4(x)+2(x)+8 =528

x^{2}+4(x)+2(x)+8-528=0

x^{2}+6(x)-520=0

Solving the quadratic by using middle term splitting or directly with quadratic formula we can find the value of 'x' .

Here it is solved with quadratic formula:

Comparing with standard equation ax^{2}+b(x)+c=0,here a=1,b=6\ and\ c=-520.

x= \frac{-b \pm \sqrt{b^2-4ac} }{2a} = \frac{-6 \pm \sqrt{6^2-4\times \ (-520)} }{2\times 1}

x=20,-26

We will work with the positive value of (x) so the the age of the youngest brother =(x)=20 yrs.

And the age of the the oldest brother =(x+6)=(20+6)=26 years.

The age difference is of (26-20)=6 years.

4 0
4 years ago
Solve and graph 7 &gt; c + 18?
Kryger [21]
7 - (c + 18) > 0
-1 (c + [11])
~Now multiply each of the sides by -1~
c + 11 < 0
~Then , subtract 11 from each of the sides that you're working with~
c < -11
~Lastly, "c" becomes a negative~
-c - 11.0 > 0

Therefore your answer would have to be:
c < -11
8 0
3 years ago
What decimal can be added to 0.0545454 To get 0.1545454
Mila [183]
0.1005454 + 0.0545454 = <span>0.1545454</span>
6 0
3 years ago
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