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3 years ago

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The cost of a monthly cell phone plan, in dollars, is modeled by the function c(x)=0.6x+30 where x is the number of text message

s.
a. $1.80 per text message

b. $0.60 per text message

c. $3.06 per text message

d. $6.00 per text message

1 answer:

Nonamiya [84]3 years ago

5 0

B is the answer hope this helps

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24.60 - 8.25 + 11.50 = 30

16.35 + 11.50 = 30

27.85 <span>≠ </span>30

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4 years ago

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Given that sin theta = 1/4, 0→theta→π/2, what<br>. what is the exact value of cos 8?

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<h3>Answer: Choice B $\frac{\sqrt{15}}{4}$ </h3>

===========================================================

Work Shown:

Angle theta is between 0 and pi/2, so this angle is in quadrant Q1.

Square both sides of the given equation

$\sin \theta = \frac{1}{4}\\\\\sin^2 \theta = \left(\frac{1}{4}\right)^2\\\\\sin^2 \theta = \frac{1}{16}$

Then use the pythagorean trig identity to get

$\sin^2 \theta + \cos^2 \theta = 1\\\\\cos^2 \theta = 1-\sin^2 \theta\\\\\cos \theta = \sqrt{1-\sin^2 \theta} \ \ \ \text{cosine is positive in Q1}\\\\\cos \theta = \sqrt{1-\frac{1}{16}}\\\\\cos \theta = \sqrt{\frac{16}{16}-\frac{1}{16}}\\\\\cos \theta = \sqrt{\frac{16-1}{16}}\\\\\cos \theta = \sqrt{\frac{15}{16}}\\\\\cos \theta = \frac{\sqrt{15}}{\sqrt{16}}\\\\\cos \theta = \frac{\sqrt{15}}{4}\\\\$

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3 years ago

A survey of 14 middle school students showed the mean number of minutes students talked on the cell phone in a week was 133. Wha

Orlov [11]

Roughly 1862 minutes.

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4 years ago

Will give brainliest if correct

goldfiish [28.3K]

Answer:

15) Slope (m) = -7/5

16) Slope (m) = 0

17) Slope (m) = 1/0 (It's an undefined slope, in other words it's just a vertical line)

Step-by-step explanation:

Use this formula for each, to find slope⤵⤵⤵

$\frac{y {2} - y1}{x2 - x1}$

15) ⤵

$\frac{10 - 3}{ - 1 - 4} = \frac{7}{ - 5} = - \frac{7}{5}$

16) ⤵

$\frac{ - 5 - ( - 5)} {2 - 3} = \frac{0}{ - 1} = 0$

17) ⤵

$\frac{ 3 - 2}{ - 5 - ( - 5)} = \frac{1}{0}$

Hope this helps :)

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2 years ago

26. An electronic game store is offering a 20% discount on all items in the store.

Alborosie

Answer:

11$

Step-by-step explanation:

20% is equivalent to 0.20, so if we multiply that by 55, it will take off 20% of the price, giving us 11$.

0.20 × 55 = 11

Brainliest please?

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2 years ago

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