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kupik [55]
3 years ago
7

If xy = 1, which is equivalent to x(x – 1)(y + 1)?

Mathematics
1 answer:
dmitriy555 [2]3 years ago
7 0

Answer:

B) x^2 – 1

Step-by-step explanation:

x(x – 1)(y + 1)

FOIL (x-1)(y+1)

firsy: xy

outer 1x

inner -1y

last (1)(-1) =-1

Add them together  xy +x-y-1

x( xy +x-y-1)

Replace xy with 1

x( 1+x-y-1)

x(+x-y)

Distribute

x^2-xy

But xy=1

x^2 -1

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kifflom [539]

Step-by-step explanation:

(X1,Y1) = (-2,2)

(X2,Y2) = (0,1)

• Find slope.

m = (Y2 - Y1)/(X2 - X1)

m = (1 - 2)/(0 - (-2))

m = -1/2

The answer is C.

6 0
2 years ago
Please help I'm almost done the test and need this and one other question ​
PolarNik [594]

Answer:

z=68

Step-by-step explanation:

Use the formula 180\times(n-2) to find the sum of the angles in a polygon, given <em>n</em> sides. This formula tells us the angles of this pentagon must add to 540 (180\times(5-2)=540).

So, we can setup an equation:

70+2z+11+119+z+2z=540

Solve for z:

200+5z=540 Combine like terms

5z=340 Subtract 200

z=68 Divide by 5

Therefore, the value of z = 68.

6 0
4 years ago
What is the product (<img src="https://tex.z-dn.net/?f=%287%5Csqrt%7B8%7D%20%2B3%5Csqrt%7B12%7D%20%29%287%5Csqrt%7B8%7D%20-3%5Cs
tangare [24]
The product should be 284.
4 0
3 years ago
Which expression represnts the product of 2xy and 3xy+5y-xy^2
melisa1 [442]

Answer:

You distribute the 2xy and get

2xy(3xy + 5y - xy^2) = 6(x^2)(y^2) + 10xy^2 - 2(x^2)(y^3)

8 0
3 years ago
Which unit of measure would be appropriate for the volume of a sphere with a radius of 2 meters
stiv31 [10]

<span>A sphere is a perfectly round geometrical object that is three dimensional, with every point on its surface equidistant from its center. Many commonly-used objects such as balls or globes are spheres. If you want to calculate the volume of a sphere, you just have to find its radius and plug it into a simple formula, V = ⁴⁄₃πr³</span>
6 0
3 years ago
Read 2 more answers
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