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olya-2409 [2.1K]
3 years ago
11

a cell phone company charges $80 per month for unlimited talk, text, and data. write an expression to determine the amount you h

ave paid to the cell phone provider after any number of months. identify the constant and coefficient and explain what it means in terms of this problem PLEASE HELP ME IM LITERALLT CRYING
Mathematics
1 answer:
Lunna [17]3 years ago
8 0

Answer:

80x

Step-by-step explanation:

If you pay 80 a month then to find the total you have paid after any number of months you would multiply amount times time which in this case is 80

a constant is the a number on its own so in this case there would be none

a coefficient is the number in front of a variable. Since the equation is 80x the coefficient is 80

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high contrast toggle How many window coverings are necessary to span 50 windows if each window covering is 15 windows long?
raketka [301]
We know that
<span>If each window covering covers 15 windows, and there are a total of 50 windows to be covered,
it will take -------> 50/15=3.33  windows coverings 
</span>So,
you need more than 3 coverings,
and so take the next whole number --------> 4 window coverings

the answer is
4 window coverings

5 0
2 years ago
PLS PLS PLS ANSWER 5 AND 6 AND TELL ME THE CORRECT ANSWER AND HOW TO GET THE CORRECT ANSWER THANK. WHOEVER ANSWER THIS CORRECTLY
yuradex [85]
The answer to 5 is A. And the answer to #6 is B. Here is why: So the cost for 6 pens is $2.34. So, you want to find the unit rate. The unit rate basically, in this case, would be how much on pen costs. So to find how much one pen costs you would divide 6 into $2.34. That would give you .39¢. Now to find out how much 20 pencils would cost you would multiply .39¢ by 20. This would give you $7.80. Do you see it now? I hope this could be helpful!
3 0
3 years ago
Read 2 more answers
O terreno da fazenda de Eduardo foi aumentado 2 m na horizontal e 2 m na vertical. Se antes do aumento o terreno tinha o formato
Novay_Z [31]

Answer:

New area of Eduardo's farm after the increase = x² + 4x + 4

Nova área da fazenda de Eduardo após o aumento = x² + 4x + 4

Step-by-step explanation:

English Translation

The land on Eduardo's farm was increased by 2 m horizontally and 2 m vertically. If before the increase the land was shaped like an x-side square, what is the new area after the increases?

Solution

The previous area of Eduardo's farm is the are of a square with side lenght of x.

Area of a square = (side length)² = x²

Then, the land on Eduardo's farm was increased by 2 m horizontally and 2 m vertically.

New horizontal length of Eduardo's farm = (x+2)

New vertical length of Eduardo's farm = (x+2)

New area of Eduardo's farm = (x+2)(x+2)

= x² + 4x + 4

In Portugese/Em português

A área anterior da fazenda de Eduardo é a de um quadrado com comprimento lateral de x.

Área de um quadrado = (comprimento lateral)² = x²

Em seguida, o terreno da fazenda de Eduardo foi aumentado 2 m na horizontal e 2 m na vertical.

Novo comprimento horizontal da fazenda de Eduardo = (x + 2)

Novo comprimento vertical da fazenda de Eduardo = (x + 2)

Nova área da fazenda de Eduardo

= (x + 2) (x + 2) = x² + 4x + 4

Hope this Helps!!!

Espero que isto ajude!!!

7 0
3 years ago
A researcher posed a null hypothesis that there was no significant difference between boys and girls on a standard memory test.
kompoz [17]

Complete Question

A researcher posed a null hypothesis that there was no significant difference between boys and girls on a standard memory test. He randomly sampled 40 girls and 40 boys in a community and gave them the standard memory test. The mean score for girls was 68 and the standard deviation of mean was 5.0. The mean score for boys was 66 and the standard deviation of mean was 5.0. What is the p-value and your conclusion at alpha 0.05

Answer:

The p-value is  p-value =0.073614

 The conclusion is  

There is sufficient evidence to support the claim  that there was no significant difference between boys and girls on a standard memory test

Step-by-step explanation:

From the question we are told that

      The sample size of boys and girls is  n_1= n_2 = n  = 40

      The standard deviation is  s_1=   s_2 = s = 5

        The level of significance is  \alpha = 0.05

       The sample mean for boys is  \= x_1 =66  

The null hypothesis is  H_o :  \mu_1 = \mu_2

The alternative hypothesis is  H_a :  \mu_1 <  \mu_2

 Generally the test statistics is mathematically represented as

           z = \frac{\= x_1 - \= x_2 }{ \sqrt{\frac{s_1 ^2 }{n_1}  + \frac{s_2 ^2 }{n_1}  } }

=>       z = \frac{66 -68 }{ \sqrt{\frac{5^2 }{40}  + \frac{5 ^2 }{40}  } }

=>       z = -1.789

From the z table  the area under the normal curve to the left corresponding to    -1,789   is

          P(Z <  -.1789 ) = 0.036807

Generally the p-value is mathematically represented as

         p-value =  2 P(Z <  -.1789 )

=>      p-value = 2 * 0.036807

=>      p-value =0.073614

From the values obtained we see that  p-value <  \alpha hence

The decision rule is  

Fail to reject the null hypothesis

 The conclusion is  

There is sufficient evidence to support the claim  that there was no significant difference between boys and girls on a standard memory test

 

3 0
2 years ago
At Yankee Candle, four large candles and three small candles sell for $34. For
yanalaym [24]

Answer:

the answer is D

Step-by-step explanation:

{4x+3y=34

{2x+y=16

7 0
3 years ago
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