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S_A_V [24]
3 years ago
15

Factor completely: 81x4 – 81 (9x2 + 9)(9x2 – 9) (3x + 3)2(3x – 3)2 (3x + 3)(3x – 3) (9x2 + 9)(3x + 3)(3x – 3)

Mathematics
2 answers:
Eduardwww [97]3 years ago
7 0
Last voice (9x^2+9)(3x-3)(3x+3)
Aleksandr [31]3 years ago
5 0
81 is the same as 3⁴.

Thus, we can write it as:
(3x)^{4} - 3^{4}
= [(3x)^{2}]^{2} - [3^{2}]^{2}
= [(3x)^{2} - 3^{2}][(3x)^{2} + 3^{2}]
= (3x - 3)(3x + 3)[(3x)^{2} + 3^{2}]
= (3x - 3)(3x + 3)(9x^{2} + 9)
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A train leaves Little​ Rock, Arkansas, and travels north at 75 kilometers per hour. Another train leaves at the same time and tr
Alecsey [184]

Answer:

3h

Step-by-step explanation:

let time be x

total distance = 450

75x+75x=450

150x=450

x=3h

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OleMash [197]
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8 0
3 years ago
With a slope of m = -2 and a point being (5,-2) what’s the Y-intercept?
almond37 [142]

Answer:

c = 8

Step-by-step explanation:

Given the following data;

Slope, m = -2

Points (x, y) = (5, -2)

To find the intercept, c;

Equation of a straight line is given by the formula: y = mx + c

Where;

m is the slope.

x and y are the points

c is the intercept.

Substituting the values in order to find the intercept, we have;

-2 = -2(5) + c

-2 = -10 + c

c = 10 - 2

c = 8

Therefore, the y-intercept is 8.

3 0
3 years ago
Help on this one as well ii manged to get an answer but If you understand it or im wrong an you please explain ! thank you !!
AnnZ [28]
Almost got it!

x + 3 = 3(y + 2)/2 [Multiplied both sides by 3]
so x + 3 = (3y + 6)/2
2(x + 3) = 3y + 6 [Multiplied both sides by 2]
2x + 6 = 3y + 6
2x = 3y [Subtracted 6 from both sides]
x = 3y/2 [Divided both sides by 2]
x/3 = y/2 [Divided both sides by 3]

So you wrote y/3 instead of y/2 
Hope this helped!
8 0
3 years ago
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