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seropon [69]
3 years ago
11

Karen purchased a prepaid phone card for $15. Long distance calls cost 11 cents a minute using this card. Karen used her card on

ly once to make a long distance call. If the remaining credit on her card is $13.68, how many minutes did her call last?
I need help on this!
Mathematics
1 answer:
Fiesta28 [93]3 years ago
4 0

Answer:

12 minutes

Step-by-step explanation:

You subtract 13.68 from 15 which gives you 1.32 which you then divide by .11 since it was eleven cents per minute on the phone and you end up getting 12.

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In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq
soldi70 [24.7K]

Answer:

see explanation

Step-by-step explanation:

let pq = x

given oq - pq = 1 then oq = 1 + x

Using Pythagoras' identity, then

(oq)² = 7² + x²

(1 + x)² = 49 + x² ( expand left side )

1 + 2x + x² = 49 + x² ( subtract 1 from both sides )

2x + x² = 48 + x² ( subtract x² from both sides )

2x = 48 ( divide both sides by 2 )

x = 24 ⇒ pq = 24

and oq = 1 + x = 1 + 24 = 25 ← hypotenuse

sinq = \frac{opposite}{hypotenuse} = \frac{7}{25}

cosq = \frac{adjacent}{hypotenuse} = \frac{24}{25}



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3 years ago
A good walking pace would let you travel 4.5 miles in 90 minutes. What is your walking speed?
LiRa [457]
I think it’s 20 mph?
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Describe the end behavior of a polynomial with a quadratic term with a negative coefficient and a linear term with a positive co
iogann1982 [59]

Answer: I think it’s A

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3 0
2 years ago
Will do a brainly! 4/7=18/31.5
german

Answer:

True

Step-by-step explanation:

  1. 4 ÷ 7 = 0.5714
  2. 18 ÷ 31.5 = 0.5714
  3. Because they are the same result, the two fractions are equal. Therefore, the equation is true.

I hope this helps!

3 0
3 years ago
Question 2
julia-pushkina [17]

Answer:

A. C = (d-ab)/a

Step-by-step explanation:

a(c + b) = d

a(c + b)/a = d/a

c + b = (d/a)

c = (d/a) - b

a(c + b) = d

ac + ab = d

ac = d - ab

ac/a = d/a - ab/a

c = (d/a) - b

5 0
2 years ago
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