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gladu [14]
3 years ago
10

Calls from a call box are charged per minute at one rate for the five minutes, then a different rate for each additional minute.

If a 7-minute call costs $4.25 and a 12-minute call costs $5.50, find each rate.​
a.$ 1.50 per minute at one rate for the first 5 minutes and $0.50 per minute thereafter
b.$3.20 per minute at one rate for the first 5 minutes and $0.55 per minute thereafter
c.$0.75 per minute at one rate for the first 5 minutes and $0.25 per minute thereafter
d.$2.40 per minute at one rate for the first 5 minutes and $0.75 per minute thereafter
Which answer is it ?????????
Mathematics
1 answer:
nirvana33 [79]3 years ago
5 0

Answer:

  c.  $0.75 per minute at one rate for the first 5 minutes and $0.25 per minute thereafter

Step-by-step explanation:

The last 5 minutes of the 12-minute call cost ...

  $5.50 -4.25 = $1.25

so the per-minute rate at that time is ...

  $1.25/(5 min) = $0.25/min . . . . . . . . matches choice C only

__

You know the answer at this point, but if you want to check the rate for the first 5 minutes, you can subtract 2 minutes from the 7-minute call to find that ...

  The first 5 minutes cost $4.25 - 2·0.25 = $3.75, so are charged at ...

     $3.75/(5 min) = $0.75/min . . . . . . . matches choice C

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P= 20x+2 ft

Step-by-step explanation:

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8 0
3 years ago
At this market,6 batteries cost 10.38 how much do 8 batteries cost
3241004551 [841]
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7 0
3 years ago
10 weeks ago Jerry bought stock at 21 and a half today the stock is valued at 20 and 3/8 we can say the stock is performing at w
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7 0
3 years ago
Correct answers only please!
MrRissso [65]

Answer:

23.6°

Step-by-step explanation:

In this question we have to use some trigonometry to work out angle XVW. Since we are working out angles all of the trigonometric functions will have to be to the ⁻¹. The first thing we need to identify is will formula will we use out of the following:

Sin⁻¹ = Opposite ÷ Hypotenuse

Tan⁻¹ = Opposite ÷ Adjacent

Cos⁻¹ = Adjacent ÷ Hypotenuse

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10 = Hypotenuse

4 = Opposite

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We know which formula to use because the length won't be in the triangle for example we will be using the Sin triangle because we don't have an adjacent. If we don't have an adjacent then the other formula's won't work.

Now we substitute in the values to find the value of angle XVW

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6 0
3 years ago
I like risking my points for hard homework
ELEN [110]

Answer:

The triangle and the square have the same area because they both have four squares

Step-by-step explanation:

The square has four that are easily shown but the triangle has one full one but when two are split together like some of them when you put the two together they equal one whole.

Have a wonderful day/night/afternoon

7 0
2 years ago
Read 2 more answers
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