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dexar [7]
2 years ago
6

A cell phone company charges $40 per month for unlimited calling, and $0.20 per text message sent. If t represents the number of

text messages Roxy sent last month, which expression represents the cost of her bill last month before any taxes or additional fees?
40 − 0.2t
(40 + 0.2)t
40 + 0.2t
(40 − 0.2)t
Mathematics
2 answers:
kotegsom [21]2 years ago
7 0

Answer: 40 + 0.2t

Step-by-step explanation:

padilas [110]2 years ago
5 0

Answer:   C. <u><em>40 + 0.2t</em></u>

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How kany doulutions does this equation have 25 - 4x=15-3x+10-x
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Since it's a one-variable equation, it has only one solution:

25 - 4x = 15 - 3x + 10 - x

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BioTeacher101
4 0
3 years ago
NASA is conducting an experiment to find out the fraction of people who black out at G forces greater than 6. In an earlier stud
SSSSS [86.1K]

Answer:

The large sample n = 190.44≅190

The  large  sample would be required in order to estimate the fraction of people who black out at 6 or more Gs at the 85% confidence level with an error of at most 0.04 is n = 190.44

<u>Step-by-step explanation</u>:

Given  population proportion was estimated to be 0.3

p = 0.3

Given maximum of error E = 0.04

we know that maximum error

M.E = \frac{Z_{\alpha } \sqrt{p(1-p)} }{\sqrt{n} }

The 85% confidence level z_{\alpha } = 1.44

\sqrt{n} = \frac{Z_{\alpha } \sqrt{p(1-p)} }{m.E}

\sqrt{n} = \frac{1.44X\sqrt{0.3(1-0.3} }{0.04}

now calculation , we get

√n=13.80

now squaring on both sides n = 190.44

large sample n = 190.44≅190

<u>Conclusion</u>:-

Hence The  large  sample would be required in order to estimate the fraction of people who black out at 6 or more Gs at the 85% confidence level with an error of at most 0.04 is n = 190.44

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3 years ago
When the smaller of two consecutive integers is added to three times the larger the result is 31. find the integer
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8 and 10 are the integers
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