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2 years ago

15

What is the first step to writing an equation of a line when given two points?

1 answer:

Alisiya [41]2 years ago

3 0

Find the slope of the line using the two points by plugging them into this formula: m = y2 - y1 / x2 - x1 where the two points are x1, y1 and x2, y2 and m is the slope.

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If x+3 is a factor of x^3-x^2-10x+A. What is the value of A?

Leno4ka [110]

Answer:

$A = 6$ .

Step-by-step explanation:

Let $a$ denote a constant (a number, rather than a variable like $x$ .)

Let $f(x)$ denote an expression about $x$ (for example,

By the factor theorem, if $(x - a)$ is a factor of $f(x)$ , then $f(a) = 0$ . In other words, if all mentions of $x$ in the expression $f(x)\!$ are replaced with $a$ , then the expression should evaluate to zero.

$(x + 3)$ is equivalent to $(x - (-3))$ . That is: $a = -3$ .

Replace all mentions of $x$ in $x^3 - x^2 - 10\, x + A$ by $(-3)$ to get:

$(-3)^3 - (-3)^2 - 10\times (-3) + A$ .

That should evaluate to zero. Therefore: $-27 - 9 + 30 + A = 0$ . Solve for $A$ to get $A = 6$ .

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3 years ago

What the slope of 3,4 7,-4

Trava [24]

Answer: The slope is -2

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2 years ago

Please help!!!!! <br><br><br> Split using partial fraction decomposition

Rama09 [41]

Answer:

11

Step-by-step explanation:

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2 years ago

Which model represents 2 x 0.9?

rjkz [21]

Answer:

<h2>Model B</h2>

Step-by-step explanation:

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<em>Hope this helps</em>

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2 years ago

Read 2 more answers

8 quarters or 2 1 dollar bills and why

anygoal [31]

They both have the same value.

Step-by-step explanation:

4 quarters= 1 dollar

So, 8 quarters would be 2 dollars.

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3 years ago