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Rudiy27
3 years ago
15

How can I factor 27x³ 64=0?

Mathematics
1 answer:
Dmitriy789 [7]3 years ago
6 0
You need to memorize how to factor cube roots, i.e. x^3 - y^3  or  x^3 + y^3.
You left a + or - sign out but:

Here you have the difference of 2 cubes.
Then (3x - 4)( 9x^2 + 12x + 16)
    or  (3x+ 4)( 9x^2 - 12x + 16)
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If y varies directly as x and y = 42 when x = 6, find the equation that gives the relationship between x and y.
Troyanec [42]

Answer:

B

Step-by-step explanation:

since K is constant ( the same for every point) we can find k when given any point by dividing the y-coordinate by the x-coordinate.

6 0
2 years ago
How many times does the equation f(x)=2x^2+9x-5 intersect the x-axis
Komok [63]

Answer:

2

Step-by-step explanation:

f(x)=2x^2+9x-5

When we are find how many times it intersects the x axis, we are finding the zero's. Set the equation equal to zero

0=2x^2+9x-5

Factor the equation

0 = (2x+1) (x-5)

2*1

1*-5 = -5

2*-5 +1*1 = -9

This checks for the first last and middle terms so we factored correctly

Then using the zero product property

2x+1 = 0 and x-5 =0

2x = -1    x=5

x = -1/2  and x=5

This function crosses the x axis 2 times

8 0
3 years ago
What is the area of a triangle whose sides are 12 6 and 20 meters long
aleksley [76]
38 meters long is the answer
3 0
2 years ago
When you subtract one equation from the other what is the value of x
sweet [91]

Answer:

uh depends on the equations

6 0
3 years ago
PLEASE HELP! URGENTTTTTT 
skad [1K]
25% is being taken off the original price, p, of each patio chairs. 

That means the price of each patio chair is the full price, p, minus <span>25% of the original price.
1) To find 25% of the original price, multiply p (original price) by the decimal form of 25%, or 0.25. That means 25% off original price = 0.25p. 
2) Now subtract 0.25p from the original price of the chairs to find the price of each (1) chair. p - 0.25p

Shylah is buying 4 chairs at that discounted price. That means you need to multiply the discounted price, </span> p - 0.25p, by 4. Shylah is paying 4(p-0.25p) total for the 4 chairs, which is answer choice B.

Since you can choose more than one choice, you can simplify 4(p-0.25p) by subtracting what is in the parathesis, then multiplying, following the order of operations:
4(p-0.25p) 
= 4(0.75p)  
= 3p
That is answer choice A. 

--------

Answer: Choices A and B, <span>3p and 4(p−0.25p).</span>
8 0
2 years ago
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