X^2-xy+3y^2=15 x-y=2

Mathematics

1 answer:

weeeeeb [17]3 years ago

8 0

x^2-xy+3y^2=15 x-y=2

Make the equation X:

x = y + 2

Plug in and Solve:

(y+2)^2 - y(y+2) + 3(y+2)^2 = 15

y = (√46) - 7/3

y = - 7 + (√46)/3

You might be interested in

Dakota’s parents are creating her practice ballet studio and want to install baseboards around the perimeter of the rectangular

kherson [118]

1. When you estimate, it is not an exact measurement. 3ft 8 in gets rounded to 4ft and 12 ft 3 in rounds to 12ft. now find the perimeter. P=2l+2w P= 2*12 +2*4 P=32feet

2. 3ft 8in = 3 8/12 or reduced to 3 2/3 12ft 3in = 12 3/12 or reduced to 12 1/4 The fractional part is referring to a fraction of a foot.

3. The perimeter of the room is P=2l+2w or P=2(12 1/4) + 2(3 2/3) p=24 1/2 + 7 1/3 P= 31 5/6 feet

4. The estimate and the actual are very close. They are 1/6 of a foot apart.

5a. Total baseboard 31 5/6ft - 2 1/4 ft = 29 7/12 feet needed.

5b. Take the total and divide it by 8ft = 29 7/12 divided by 8= 3.7 You are not buying a fraction of a board so you would need 4 boards.

4 0

3 years ago

Let x represent any year. Write an inequality in terms of x and 453 that is true only for values of x that represents years afte

Elis [28]

Try google I’m sorry I don’t know

8 0

3 years ago

What is the smallest and largest natural number

Vladimir [108]

The smallest natural number is 1. The largest natural number does not exists because there will always be one even larger. But if you are asking the number of all natural numbers or the size of natural number set then $\aleph_0$ is your answer.