A prism _____has two congruent, parallel bases.<br> A Sometimes<br> B never<br> C always

The cost to purchase a song from iTunes is $0.99 per song. To purchase a song from napster membership fee is $10. In addition, e

jonny [76]

Answer:

Step-by-step explanation:

Itunes : 0.99 per song......let d represent the number of songs

so the expression for this is : 0.99d

Napster : 10 bucks + 0.89 per song

this expression would be : 10 + 0.89d

so if u want to find out when they will be the same, set them equal to each other and solve for d

0.99d = 10 + 0.89d

0.99d - 0.89d = 10

0.10d = 10

d = 10 / 0.10

d = 100.......so 100 songs must be purchased <===

check it...

itunes : napster :

0.99(100) = $ 99 10 + 0.89(100) = 10 + 89 = $ 99

it checks out :)

4 0

3 years ago

If a jogger runs a 10-kilometer race in 60 minutes, what is her average speed?

STALIN [3.7K]

Answer:

A

Step-by-step explanation:

Speed = distance/ time

=10km/ 1hr(60mins)

= 10km/ 1hr

=10km/hr

3 0

2 years ago

5(g+8)-7=103<br>what's the answer?

castortr0y [4]

Do you need the steps? g=14

3 0

3 years ago

Read 2 more answers

Help it’s slope idk how to do it

Over [174]

a. $\boxed{y-602=\frac{2}{3}(x-3)}$

b. For every month the pine tree grows about 0.67 inches.

c. <em> </em>It represents the height of the tree at the moment Ariel started to record the heights.

<h2>Explanation:</h2>

In this exercise we have that in July Ariel recorded the height of a pine tree and how quickly it was expected to grow in next several months. From the Table, we can get the following points:

$P_{1}(3,602) \\ \\ P_{2}(6,604) \\ \\ P_{3}(q,606) \\ \\ P_{4}(12,608)$

It is obvious that this problem follows a linear equation, so our goal is to find the equation that matches the Table.

The point slope form of the equation of a line is:

$y-y_{1}=m(x-x_{1}) \\ \\ Where: \\ \\ m:Slope \\ \\ (x_{1}, y_{1}):A \ point \ on \ the \ line$

Finding (m):

$Using: \\ \\ P_{1}(x_{1},y_{1}) \rightarrow P_{1}(3,602) \\ \\ P_{2}(x_{2}, y_{2}) \rightarrow P_{2}(6,604) \\ \\ m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{604-602}{6-3} \\ \\ m=\frac{2}{3}$

Finally, the equation of the line is:

$(x_{1}, y_{1}) \rightarrow (3,602) \\ \\ \boxed{y-602=\frac{2}{3}(x-3)}$

In this case, we have that:

The x-axis represents the <em>Number of Months </em>the pine tree was expected to grow.
The y-axis represents the <em>Height of the Tree </em>in inches.

Since the slope o a line is:

$Slope=\frac{Change \ in \ y}{Change \ in \ x}=\frac{2}{3}$

Then, this means that<em> every three months the pine tree grows two inches, </em><em>or </em><em>for every month the pine tree grows about 0.67 inches.</em>

The y-intercept can be found setting $x=0$ . So, from our equation: