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777dan777 [17]
2 years ago
8

(7,-2) and has a slope of -3

Mathematics
1 answer:
Rudiy272 years ago
5 0
Y+2=-3(x-7) is one of the formations
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A small publishing company is planning to publish a new book. The production cost will include one time fix costs (such as editi
icang [17]

For the first method the fix cost is $ 15,113 and the variable cost is $ 22/book.

For the second method the fix cost is $ 63,848 and the variable cost is $ 10.75/book.

Let the number of books be <em>x</em> for which the cost from the two methods is same,

\begin{gathered} 15113+22x=63848+10.75x \\ 11.25x=48735 \\ x=4332 \end{gathered}

Thus, the required number of books is 4332.

7 0
1 year ago
Just answer, no explanation needed!
andreyandreev [35.5K]

Answer:

The answers are C and E

-----------------------------

4 0
3 years ago
Read 2 more answers
Satellites can be put into elliptical orbits if they need only sometimes to be in high- or low-earth orbit, thus avoiding the ne
tatyana61 [14]

Answer:

a)  \frac{x^2}{4446^2}+\frac{y^2}{4420^2}=1

b)  Highest Altitude = 486 miles

Lowest Altitude = 460 miles

Step-by-step explanation:

a)

The standard form of equation of ellipse is:

\frac{x^2}{a^2}+\frac{y^2}{b^2}=1

If a > b, then the major axis is horizontal.

If a < b, then the major axis is vertical.

Now, given:

a = 4446

b = 4420

We can write the equation of the ellipse as:

\frac{x^2}{a^2}+\frac{y^2}{b^2}=1\\\frac{x^2}{4446^2}+\frac{y^2}{4420^2}=1

This is the equation, centered at origin.

b)

Since a > b, we can say that the major axis is horizontal and minor axis is vertical.

So, it stretches:

4446 miles from the center of the earth towards both -x and +x axis

and

4420 miles from the center of the earth towards both -y and +y axis

Since, the radius of the earth is 3960 miles, it means from center to earth's surface in all sides is 3960 miles.

The highest and lowest point altitude will be the different in x and y axis (horizontal and vertical) of the point with orbit of the satellite.

4446 - 3960 = 486 miles

and

4420 - 3960 =  460 miles

Thus,

<u>Highest Altitude = 486 miles</u>

<u>Lowest Altitude = 460 miles</u>

8 0
3 years ago
300 x 25.4<br> SHOW YOUR WORK
Lana71 [14]

Answer:

7620

Step-by-step explanation:

25x 3 = 75 so 25x 300 = 7500

4x 300 = 1200

0.4x300 = 120

7500+120 = 7620

6 0
2 years ago
A tree's height increase by 15%. If a tree is 23 feet high, how tall will it be in one year ?
Ghella [55]

Increased height:-

\\ \sf\longmapsto 23\times 15\%

\\ \sf\longmapsto 23\times \dfrac{15}{100}

\\ \sf\longmapsto \dfrac{345}{100}

\\ \sf\longmapsto 3.45

Now current height:-

\\ \sf\longmapsto 23+3.45=26.45ft

8 0
2 years ago
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