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3 years ago

what is the product of 6x – y and 2x – y 2? 8x2 – 4xy 12x y2 – 2y 12x2 – 8xy 12x y2 – 2y 8x2 4xy 4x y2 – 2y 12x2 8xy 4x y2 2y

Mathematics

2 answers:

dusya [7]3 years ago

7 0

Answer: 12x^2 – 8xy + 12x + y^2 – 2y

Step-by-step explanation:

tekilochka [14]3 years ago

3 0

$(6x-y)(2x-y)=12x^{2}-8xy+y^{2}$

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Charity is four times as old as her daughter. She is also six years younger than her husband. The sum of their ages ten years to

zubka84 [21]

Answer: Charity is 36 years old today.

Step-by-step explanation:

Let x = Present age of daughter.

Age of Charity = 4x

Age of her husband = 4x+6

After 10 years,

Age of daughter = x+10

Age of Charity = 4x+10

Age of her husband = 4x+6+10=4x+16

As per given,

$x+10+4x+10+4x+16=117$

$9x+36=117\\\\ 9x=117-36\\\\ 9x=81\\\\ x=9$

Present age of Charity = 4(9)=36 years

Hence, Charity is 36 years old today.

4 0

3 years ago

A sector with a central angle measure of 200 degrees has a radius of 9cm

Helen [10]

Answer:

B) $45\pi cm^{2}$

Step-by-step explanation:

$A=\frac{\pi r^{2}(central. Angle) }{360} =\frac{\pi (9)^{2}(200) }{360} =\frac{\pi (81)(200)}{360}=45\pi cm^{2}$

Hope this helps

3 0

2 years ago

A 35% sodium hydroxide solution is to be mixed with a 60% sodium hydroxide solution to obtain 20 liters of 40% sodium hydroxide

nydimaria [60]

0.35x + 0.60y = 0.40(x + y) where x = vol. of 35% and y = vol. of 60%

x + y = 20

solve this system of equations

x + y = 20
-0.05x +0.20y = 0

this gives x = 16 and y = 4

so you need 16 L of 35% and 4 L of 60% solution.

3 0

3 years ago

Which point has coordinates (0, -5) ?

inysia [295]

Answer:

Hi the point that has the coordinates of (0, -5) is point •W ( The LIGHT GREEN one ).

Step-by-step explanation:

The reason one why it's point •W ( The LIGHT GREEN one ) is because it's still on the line which is the y-axis and also because it's on -5. Sorry I'm not that good at explaining things

3 0

2 years ago

39 3.3 5.1 3.3 x find the value in the triangle shown below

prohojiy [21]

9514 1404 393

Answer:

x = 102

Step-by-step explanation:

Isosceles triangles have equal angles opposite equal sides. There are two 39° angles in this triangle (opposite the 3.3 sides), so the third one is ...

x° = 180° -2(39°)

x° = 102°

_____

<em>Additional comment</em>

The triangle is "overspecified", meaning more measures are provided than are necessary to completely describe the triangle. As is often the case in such situations, the measures provided are sufficiently inconsistent that two different "right" answers are possible, depending on how you work the problem. The first attachment shows the solution above.

The second attachment shows the solution you might get by using the Law of Cosines. Note that x=101 in this case.

7 0

3 years ago