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Sholpan [36]
3 years ago
15

Jenny purchased a prepaid phone card for $30.Long distance calls cost 12 cents a minute using this card. Jenny used her card onl

y once to make a long distance call. If the remaining credit on her card is $24.84, how many minutes did her call last.​
Mathematics
1 answer:
Korolek [52]3 years ago
4 0

Answer:

43 min

Step-by-step explanation:

subtract $24.84 from $30 and you get $5.16 and you divide that by 12 cents which then you get 43 min

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Simplify: 9(a + b) + 4(3a + 2b)
Alborosie

Answer:

21a + 17b

Step-by-step explanation:

To simplify, we need to distribute the 9 to the terms inside of the parentheses that it is being multiplied by and 4 to the terms inside of the parentheses that it is being multiplied by like so:

9(a)+9(b)+4(3a)+4(2b)

9a+9b+12a+8b

Add like terms

21a + 17b

6 0
2 years ago
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The table shows formulas for the recommended heart rates during exercise for a person who is "a" years old. Write and solve a co
Naily [24]

Answer:

102 ≤ heart rate ≤ 183.6

Step-by-step explanation:

... lower limit ≤ heart rate ≤ upper limit

Put 16 where "a" is and do the arithmetic.

... lower limit = 0.5(220 -16) = 102

... upper limit = 0.9(220 -16) = 183.6

Then the inequality is ...

... 102 ≤ heart rate ≤ 183.6

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<em>Comment on the problem</em>

There is nothing to "solve" here. One only needs to evaluate the limits.

7 0
3 years ago
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ch4aika [34]
The answer is c not tha
7 0
3 years ago
What is the measure of each interior angle of a regular pentagon?
marysya [2.9K]

\Huge   \underline {\mathcal {{{\color{orange}{108 \degree}}}}}

Option ( A ) is the correct answer.

  • Sum of all interior angle of a regular pentagon is 540°

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8 0
3 years ago
An airplane flies from City 1 at (0, 0) to City 2 at (33, 56) and then to City 3 at (23, 32). What is the total number of miles
uranmaximum [27]

Answer:

The airplane flies 95 miles.

Step-by-step explanation:

  1. First we need to find the distance for the first segment using the formula for distance D=\sqrt{(x_{2}-x_{1})^2 + (y_{2}-y_{1})^2}. Let's say (x_{1},y_{1}) is (0, 0) and (x_{2},y_{2}) is (33, 56). This gets us that the length of this segment is 65 miles.
  2. Next, we need to find the distance for the second segment. Using the same formula for distance  D=\sqrt{(x_{2}-x_{1})^2 + (y_{2}-y_{1})^2}, we can say (x_{1},y_{1}) is now (33, 56) and (x_{2},y_{2}) is now (23, 32). This gets us that the length of this segment is 26 miles.
  3. To get the total distance traveled, add the length of these two segments together (65 miles + 26 miles) to get 91 total miles traveled.
7 0
2 years ago
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