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3 years ago

Which is equivalent to (9y2-4x)(9y2+4x) and what type of special product is it?

Mathematics

1 answer:

Sunny_sXe [5.5K]3 years ago

7 0

Answer: I believe the answer is the second choice.

81y^4 - 16x^2, the difference of squares.

Step-by-step explanation:

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Need help pls Find m

Gekata [30.6K]

Answer:

m < its right here have fun on the test

8 0

3 years ago

Complete the statement. Round to the nearest hundredth if necessary. 48 ft =_____yd

TiliK225 [7]

Answer: 16

Step-by-step explanation:

there are 3 feet in one yard so divided 48 by 3 and you get 16

8 0

3 years ago

Read 2 more answers

(1 point) Linear System - Three Variables Solve the following system of equations using Gaussian elimination method. If there ar

EastWind [94]

Answer:

$x=\frac{-363}{70}$ ≈ -5.1857

$y=\frac{-192}{35}$ ≈ -5.4857

$z=\frac{313}{84}$ ≈ 3.7262

Step-by-step explanation:

Rewrite the equation system as:

$6x+8y=-75$

$-3x+6y+6z=5$

$2x-9y=39$

Now, write the system in its augmented matrix form:

$\left[\begin{array}{cccc}6&8&0&-75\\-3&6&6&5\\2&-9&0&39\end{array}\right]$

applying row reduction process to its associated augmented matrix:

Swap R1 and R3, and then Swap R1 and R2:

$\left[\begin{array}{cccc}-3&6&6&5\\2&-9&0&39\\6&8&0&-75\end{array}\right]$

R3+2R1

$\left[\begin{array}{cccc}-3&6&6&5\\2&-9&0&39\\0&20&12&-65\end{array}\right]$

3R2+2R1

$\left[\begin{array}{cccc}-3&6&6&5\\0&-15&12&127\\0&20&12&-65\end{array}\right]$

15R3+20R2

$\left[\begin{array}{cccc}-3&6&6&5\\0&-15&12&127\\0&0&420&1565\end{array}\right]$

Now we have a simplified system:

$-3x+6y+6z=5\\0-15y+12z=127\\0+0+420z=1565$

$-3x+6y+6z=5\hspace{5 mm}(1)\\0-15y+12z=127\hspace{3 mm}(2)\\0+0+420z=1565\hspace{3 mm}(3)$

From (3):

$z=\frac{313}{84}$ (4)

Replacing (4) in (2)

$y=\frac{-192}{35}$ (5)

Finally replacing (5) and (4) in (1)

$x=\frac{-363}{70}$

7 0

3 years ago

The area of a rectangular front yard is, 180 square feet find the length of the front yard if the width is 15 feet

VMariaS [17]

Area = length x width
180 = L x 15
L = 180/15
Length = 12 feet

6 0

3 years ago

Simplify the given expression.<br> (3x+8)(2x+6)

sladkih [1.3K]

(3x+8)(2x + 6)

6x^2+18x+16x+42
6x^2+34x+42

using the foil method, you can expand the given expression. It is already in simplified form with the given (3x+8)(2x+6)

7 0

4 years ago