salma purchased a prepaid phone card for $20. long distance calls cost 24 cents a minute using this card. salma used her card only once to make a long distance call. if the remaining credit on her card is $13.52. how many minutes did her call last?
Answers
$20 overall
$0.24 every minute
$13.52 remaining on the card
Now that we know our information, we can set it up in an equation.
20 - 0.24x = 13.52
The 20 represents $20 overall when she first got the phone card.
We are then subtracting $20 from how must it costs a minute (which is 24 cents). The 'x' indicates the number we are trying to find (how many minutes her call lasted). Lastly, 13.52 is the result of everything, since she has $13.52 remaining on the card.
We can now solve the equation:
20 - 0.24x = 13.52
-0.24x = 13.52 - 20 /// subtract 20 from each side
-0.24x = -6.48 /// simplify
x = 27 /// divide each side by -0.24
Our solution is: x = 27.
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An easier way to solve this problem would be to first, subtract the total amount of money she had on the card when she first got it, and then the remaining total she ended up with.
$20 - $13.52 = $6.48
So, she spent a total of $6.48 on long distance calls, but since we are looking for how many minutes, we need to divide the total she spent and how much it costs per minute.
6.48 ÷ 24 = 27
We receive the same amount of minutes spent just like we did the last way we solved.
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Salma spent 27 minutes on the phone.
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1) If you accept the hypothesis, then you accept the
conclusion.
2) You accept the conclusion.
Conclusion: ?
Answers
this is because if you accept the hypothesis, then you also accept the conclusion so in order to accept the conclusion you must first accept the hypothesis
Answer:
Conclusion: you have accepted the hypothesis
this is because if you accept the hypothesis, then you also accept the conclusion so in order to accept the conclusion you must first accept the hypothesis
Step-by-step explanation:
Answers
Answer:
Let the full marks be y.
Then, the statement become : 30 marks is 40 % of y.
to solve for y;
40% of y can be written as
Then,
from the given condition we have;
or
Multiply both sides by in above equation;
Simplify:
Then, the full marks (y) = 75.
Therefore, 30 marks is 40% of 75.
Check:
30 =
30 =
30 =30 [True]
30 + 30 = 60
(40%+40%)
then you half 30 which is 15
60+15=74
(you half the 40 and add 80 to 20
20+80=100) 75 marks
helped?
can you put me on the brainlest answer?
please
Answers
Answer (it has two solutions):
- k > 4
- k < -4
I hope this helps!
Answers
:)
Answer:
Its 3
Step-by-step explanation:
Answers
Answer:
3.14 ft² or 2,917 cm²
Step-by-step explanation:
To do this, we need to know the expression to calculate the area of a circle.
The area of any circle is:
A = πr²
Where:
π: value of pi, which is 3.14
r: radius of the circle, in this case 1 ft
Calculating the area in units of ft:
A = 3.14 * (1)²
A = 3.14 ft²
Now, if you convert the foot to cm we have:
1 * 30.48 = 30.48 cm
Solvinf for A:
A = 3.14 * (30.48)²
A = 2,917.15 cm²
Answer:
Pi feet squared
Step-by-step explanation: