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RideAnS [48]
2 years ago
8

Help with question pls I don't understand​

Mathematics
2 answers:
Mazyrski [523]2 years ago
6 0

Answer:

15x^3y+6x^2y^2+9xy^3

Step-by-step explanation:

3xy ( 5x^2 +2xy +3y^2)

Distribute the 3xy to all terms in the parentheses

3xy*5x^2+3xy*2xy+3xy*3y^2

15x^3y+6x^2y^2+9xy^3

Verdich [7]2 years ago
5 0

Answer:

15x^{3}y + 6x^{2}y^{2} + 9xy^{3}

Step-by-step explanation:

multiple everything in the brackets by 3xy

3xy x 5x^{2} = 15x^{3}y

3xy x 2xy = 6x^{2}y^{2}

3xy x 3y^{2} = 9xy^{3}

15x^{3}y + 6x^{2}y^{2} + 9xy^{3}

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Which is the completely factored form of 3xsquared<br> -12x-15?
tekilochka [14]

Answer:

3(x - 5)(x + 1).

Step-by-step explanation:

3x^2 - 12x - 15

Dividing through by 3:

= 3(x^2 - 4x - 5)

We need 2 numbers whose sum is -4 and whose product = -5. That is -5 and +1 , so the factors are:

3(x - 5)(x + 1).

7 0
3 years ago
The factors of 6x-30 are ?
Tju [1.3M]
So you have 6x-30. The only factor I can think of for this is x+5. Because you have 6(x+5)= 6x+30
5 0
2 years ago
Read 2 more answers
Given the right angle triangle shown here, calculate:
charle [14.2K]

Answer:

see explanation

Step-by-step explanation:

(1)

(a)

sin(a) = \frac{opposite}{hypotenuse} = \frac{15}{17}

(b)

cos(a) = \frac{adjacent}{hypotenuse} = \frac{8}{17}

(c)

tan(a) = \frac{opposite}{adjacent} = \frac{15}{8}

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

(2)

(a)

sin(b) = \frac{opposite}{hypotenuse} = \frac{8}{17}

(b)

cos(b) = \frac{adjacent}{hypotenuse} = \frac{15}{17}

(c)

tan(b) = \frac{opposite}{adjacent} = \frac{8}{15}

5 0
3 years ago
Read 2 more answers
Find X and Y please explain
Alex777 [14]

In this diagram we see that 80 and 3x+4y are both vertical angles and vertical angles are congruent or always equal so we can set those two equations equal to each other then we can see that a line splits two angles making them supplementary (they equal 180 degrees) So we can have another equation, the two equations are:

3x+4y=80 and 3x+4y+7x-8y=180 (add like terms to simplify and get 10x-4y=180

Then use elimination to get rid of the y variables

10x-4y=180 (plus)

+3x+4y=80 (the negative 4 and positive 4 cancels each other out so you are left with:)

13x=160 (divide by x)

x=12.30769 which can be rounded to x=12.31

Then we have to plug in x into the first equation:

3(12.31) + 4y = 80

36.93 + 4y = 80 (subtract 36.93 from 80)

4y = 43.07 (divide)

y=10.7675 or rounded to 10.77

so x=12.31 and y=10.77


5 0
2 years ago
Can someone plz help me asap ​
likoan [24]

Answer:

  • y = 12x - 9

Step-by-step explanation:

<u>Given</u>

  • - 1/3y + 4x = 3

Multiply all terms by -3

  • y - 12x = -9

Add 12x to both sides

  • y = 12x - 9

7 0
3 years ago
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