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Serjik [45]
3 years ago
11

Factorise21x squared - 14x​

Mathematics
1 answer:
zhannawk [14.2K]3 years ago
6 0

Answer:

7x(3x - 2)

Step-by-step explanation:

21 {x}^{2}  - 14x \\  \\  = 7x(3x - 2)

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a line segment has endpoints A (-8,6) and B (4,6). What is the distance in units between point A and B?
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The distance between point A and point B is 12 units.

Step-by-step explanation:

d = √(x2 - x1)² + (y2 - y1)²

d = √(-8 - 4)² + (6 - 6)²

d = √144 + 0

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A garden center is running a special on houseplants. A selection of any 2 plants cost $7. If a designer buys 22 plants for new h
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2 years ago
Consider the function f ( x ) = 1 − 4 x 2 on the interval [ − 1 , 3 ] . Find the average or mean slope of the function on this i
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Answer:

The average slope is 8.

Step-by-step explanation:

Let <em>f</em> be defined on the closed interval [a, b]. The average slope of <em>f </em>between a and b is the quotient

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To find the average slope of the function f(x)=1-4x^2 on the interval [-1, 3] you have to evaluate your function in the interval and then divide by the interval.

So,

f(-1)=1-4(-1)^2=-3\\\\f(3)=1-4(3)^2=-35

The average slope is  \frac{f(3)-f(-1)}{3+1}= \frac{-3+35}{3+1}=\frac{32}{4}=8

4 0
3 years ago
There is a rack of 11 billiard balls. Balls numbered 1 through 8 are​ solid-colored. Balls numbered 9 through 11 contain stripes
Dmitriy789 [7]

Answer:

Step-by-step explanation:

It should be 3 out of 11

3 0
3 years ago
Hwlsibdsja aka sus ejsnahabah HELP
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Answer:

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Step-by-step explanation:

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  y = cos(x) -1

4 0
2 years ago
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