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Sauron [17]
3 years ago
7

The credit remaining on a phone card is a linear function of the total calling time made with the card. The remaining credit aft

er 45 minutes of calls is $14.60, and the remaining credit after 67 minutes of calls is $11.96. What is the remaining credit after 81 minutes of calls
Mathematics
1 answer:
dolphi86 [110]3 years ago
5 0

If you need the answer so go to the google and search for problem

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An airplane travels 2416 kilometers against the wind in 4 hours and 2896 kilometers with the wind in the same amount of time. Wh
oee [108]

Answer: the rate of the plane in still air is 664 km/h and the rate of the wind is 60 km/h

Step-by-step explanation:

Let x represent the rate of the plane in calm air.

Let y represent the rate of the wind.

An airplane travels 2416 kilometers against the wind in 4 hours. This means that the total speed with which the plane flew is (x - y) mph.

Distance = speed × time

Distance travelled by the plane while flying against the wind is

2416 = 4(x - y)

Dividing both sides of the equation by 4, it becomes

604 = x + y- - - - - - - - - - - 1

It flew 2896 kilometers with the wind in the same amount of time.. This means that the total speed with which the plane flew with the wind is (x + y) mph.

Distance travelled by the plane while flying with the wind is

2896 = 4(x + y)

Dividing both sides of the equation by 2, it becomes

724 = x + y- - - - - - - - - - - 2

Adding equation 1 to equation 2, it becomes

1328 = 2x

x = 1328/2

x = 664

Substituting x = 664 into equation 2, it becomes

724 = 664 + y

y = 724 - 664

y = 60

5 0
3 years ago
A square pyramid has a base side length of 20.4cm and a height of 18.2cm which square pyramid is similar
Maksim231197 [3]

Answer:

C) base side length = 30.6 cm, height = 27.3 cm

Step-by-step explanation:

7 0
3 years ago
A park ranger would like to clear more than 10 miles of trail. So far, he has cleared 2 miles. From now on, he can clear 3/4 mil
Scilla [17]
It would take 7:30 minutes to clear the rest of the 10 miles.
6 0
3 years ago
natalie guessed on the last four true or false questions on her math quiz. what is the probability that she got all four quiz qu
Verizon [17]
Each question is either true or false, so the sample space is 2, true and false, two states only.

what's the probability she got one correct, well, the favorable outcomes is 1, possible outcomes is 2, so 1/2.

what's the probability that she got all four correct, we simply multiply the probability of each,


\bf \cfrac{1}{2}\cdot \cfrac{1}{2}\cdot \cfrac{1}{2}\cdot \cfrac{1}{2}\implies \cfrac{1}{16}\implies 0.0625\qquad or\qquad 6.25\%
7 0
3 years ago
HELP PICTURE IS SHOWN
Salsk061 [2.6K]
The answer is the parallel line to one of a triangle.
6 0
3 years ago
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