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devlian [24]
2 years ago
6

The cost to purchase a song from iTunes is $0.99 per song. To purchase a song from Napster, you must be a member. The Napster me

mbership is $10.
In addtion, each song cost $0.89. Write the equation to determine when iTunes and Napster will cost the same amount.
Equation:
Mathematics
2 answers:
Lynna [10]2 years ago
8 0
It’s going to take 100 songs Step by step
vlada-n [284]2 years ago
4 0

Answer:

It will take 100 songs for the monthly price of Napster to cost the same as iTunes.

Step-by-step explanation:

Let's create two equations to represent iTunes (T(d)) and Napster (N(d)):

T(d)=0.99d

N(d)=0.89d+10

In order for us to find when the two prices will be the same, let's set the equations equal to each other and solve for x:

0.99d=0.89d+10

0.1d=10

d=100

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6 0
3 years ago
From a group of 12 students, we want to select a random sample of 4 students to serve on a university committee. How many combin
borishaifa [10]

Answer:

495 combinations of 4 students can be selected.

Step-by-step explanation:

The order of the students in the sample is not important. So we use the combinations formula to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

How many combination of random samples of 4 students can be selected?

4 from a set of 12. So

C_{n,x} = \frac{12!}{4!(8)!} = 495

495 combinations of 4 students can be selected.

8 0
3 years ago
The graph is <br> A. Neither even nor odd<br> B.odd<br> C.even<br> D. Symmetrical about the y axis
dybincka [34]

Answer:

Odd

Step-by-step explanation:

The function is odd because cubic functions are always odd.

3 0
2 years ago
Write the equation in standard form for the circle that has a diameter with endpoints (- 1, 12) and (- 1, 8)​
matrenka [14]

Answer:

The equation in standard form is (x + 1)^{2} + (y - 10)^{2} = 4

Step-by-step explanation:

The distance from (-1, 12) to (-1, 8) = 4 = diameter of the circle.  So, 2 = radius

The center of the circle is at (-1, 10)

The equation in standard form is (x + 1)^{2} + (y - 10)^{2} = 4

3 0
3 years ago
What is the radius of 20?<br><br> (20 is the diameter)
Goshia [24]
Well if d= 20
d=2r

so 20 = 2r

r=10

is that what you wanted, or does this have to do with a circle 

4 0
3 years ago
Read 2 more answers
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