1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ki77a [65]
3 years ago
9

Lena purchased a prepaid phone card for $20. Long distance calls cost 21 cents a minute using this card, Lena used her card only

once to make a long distance
call. If the remaining credit on her card is $12.23, how many minutes did her call last?
Mathematics
1 answer:
slega [8]3 years ago
5 0

<u>Answer:</u>

37 minutes

<u>Step-by-step explanation:</u>

Lena has 20 dollars. 20 - 12.23 = 7.77

Lena has $7.77 dollars left.

We divide this by .21 to see how many minutes her call was.

7.77 ÷ .21 = 37

Rate as Brainliest and Thanks plz

You might be interested in
Which equation would represent 30 kittens divided into groups of 4
ollegr [7]

Answer:

30÷4

Step-by-step explanation:

8 0
3 years ago
Working alone, it takes Julia 16 hours to clean an attic. Lea can clean the same attic in 15 hours. If they worked together how
egoroff_w [7]
How do you think we set this problem up?

7 0
3 years ago
So when you are adding fractions how do you know when you need to simplify the numbers and how do you simplify?
rosijanka [135]

Let's look at an example.

We'll add the fractions 1/6 and 1/8

Before we can add, the denominators must be the same.

To get the denominators to be the same, we can...

  • multiply top and bottom of 1/6 by 8 to get 8/48
  • multiply top and bottom of 1/8 by 6 to get 6/48

At this point, both fractions involve the denominator 48. We can add the fractions like so

8/48  + 6/48 = (8+6)/48 = 14/48

Add the numerators while keeping the denominator the same the entire time.

The last step is to reduce if possible. In this case, we can reduce. This is because 14 and 48 have the factor 2 in common. Divide each part by 2.

  • 14/2 = 7
  • 48/2 = 24

The fraction 14/48 reduces to 7/24

Overall, 1/6 + 1/8 = 7/24

6 0
2 years ago
When a constant force is applied to an object, the acceleration of the object varies inversely with its mass. When a certain con
marusya05 [52]

Answer: The mass of the object is 10 kg

Step-by-step explanation:

According to Newton's second law of motion, the force F applied to an object with mass m is directly proportional to its acceleration a:

F=ma (1)

If we isolate a:

a=\frac{F}{m} (2) This means the acceleration of the object varies inversely with its mass

Now, we are given the following data to calculate a constant force using (1):

m_{1}=4 kg

a_{1}=5 m/s^{2}

F=m_{1}a_{1} (3)

F=(4 kg)(5 m/s^{2) (4)

F=20 N (5)

If we apply this same force calulated in (4) in another object with an acceleration of a_{2}=2 m/s^{2}, its mass m_{2} will be:

F=m_{2}a_{2} (6)

20 N=m_{2}2 m/s^{2} (7)

Finding  m_{2}:

m_{2}=10 kg This is the mass of the object

4 0
3 years ago
Use the quadratic formula to solve for x.
lakkis [162]
0.64,-3.14 I’m not really sure about the -3.14. (Sorry).
4 0
2 years ago
Read 2 more answers
Other questions:
  • Can anyone help me with the last question plzzz!!!
    11·1 answer
  • Noah is shopping for new socks. He sees many different options. One bag has 12 socks for $9.99, another bag has 20
    10·2 answers
  • A new car sells for $25,000. The value of the car decreases by 15% each year. What is the approximate value of the car 5 years a
    12·2 answers
  • Dione has 3 rolls of pennies containing 50 coins each, 4 rolls of nickels
    9·1 answer
  • Suppose we wish to test the hypotheses: H(o): u=15 H(1): u does not = 15 where we know that σ^2 = 9.0. If the true mean is 20, w
    11·1 answer
  • How would you do this problem?
    8·2 answers
  • Please answer quick
    8·1 answer
  • What two numbers have a product of -15 and a sum of -2?​
    7·2 answers
  • 1. A group of students are tracking a friend, Lizzo, who is riding the Ferris wheel. They know
    12·1 answer
  • The following diagram represents all of the stages of a shrinking iceberg. The iceberg is circular, and when it started out, it
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!