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4 years ago

3xy=9 is it direct variation or inverse variation or neither

Mathematics

1 answer:

steposvetlana [31]4 years ago

5 0

$3xy = 9$

$y = \dfrac 9 {3x}$

$y = \dfrac 3 x$

y varies inversely with x

Answer: inverse variation

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Find the distance between the points E(3, 7) and F(6, 5). The exact distance between the two points is .

S_A_V [24]

Answer:

$\sqrt{13}$

Step-by-step explanation:

The trick here is to know the distance formula (a formula that helps you find the distance between two points).

Distance formula: distance = $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

But now that we know this, we can simply plug in our values and solve!

$\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\\\sqrt{(6-3)^2+(5-7)^2}\\\sqrt{(3)^2+(-2)^2}\\\sqrt{9+4}\\\sqrt{13}$

Now we can tell from our answer that the distance between both points is $\sqrt{13}$

7 0

3 years ago

Tickets for a concert are $40 for main-floor seats and $25 for upper level seats. A total of 2000 concert tickets were sold. The

Tems11 [23]

Step-by-step explanation:

to show how many tickets were sold:

x = upper floor tickets

y = main floor tickets

x + y = 2000

to show total amount of revenue:

25x + 40y = 62,000

Finding answer using both equations:

x + y = 2000

multiply each side by 25

25x + 25y = 2000 × 25

25x + 25y = 50,000

25x + 40y = 62,000

25x + 25y = 50,000

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

15y = 12,000

^ this is column subtraction

^ this column subtraction is done to isolate y so we can work with one value rather than 2

15y = 12,000

divide each side by 15

12,000 ÷ 15 = 800

y = 800

x + y = 2000

x + 800 = 2000

x = 1200

Therefore 1200 upper-level tickets were sold

800 main floor tickets were sold

4 0

3 years ago

Page 26 1.4 puzzle time did you hear about..

Firlakuza [10]

Answer:

No I didn't But thank you for asking

8 0

3 years ago

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6) The perimeter of triangle ABC is 32 inches. Side B is 4 inches shorter than side A. Side C is twice as long as Side A. What i

Ivenika [448]

Answer:

The length of side A is 9 inches.

Step-by-step explanation:

B= A-4

C= A×2

B= 9-4

C= 9×2

B= 5

C= 18

9+5+18= 32 inches

A= 9 inches

B= 5 inches

C= 18 inches

3 0

2 years ago

An 8-foot-long piece of wood is cut into 3 equal pieces. How many inches long is each piece of wood?

Vinvika [58]

8 x 12 = 96 so then 96 divided by 3 is your answer which is 32. 32 inches is your answer!

7 0

2 years ago

Read 2 more answers