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2 years ago

Simplify. x+7/x^2+4x-21

1 answer:

7 0

To silpify the expression we proceed as follows:
(x+7)/(x^2+4x-21)
Factorizing the given the denominator:
x^2+4x-21
x^2-3x+7x-21
=x(x-3)+7(x-3)
=(x-3)(x+7)
thus plugging back in our expression we have:
(x+7)/[(x-3)(x+7)]
simplifying this we obtain:
1/(x+3)

Answer: 1/(x+3)

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3 years ago

Find the value of x.

drek231 [11]

Answer:

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Step-by-step explanation:

This is a 90 degree angle. We can create an equation to find x

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Hope this helps!

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3 years ago

What is the range of the relation below? {(-4,1), (-2,0), (8, -1)}

anyanavicka [17]

Answer:

Range: {-1, 0, 1}

General Formulas and Concepts:

Math

Number Line

Algebra I

Range is the set of y-values that are outputted by function f(x)
{Set Builder Notation}

Step-by-step explanation:

Step 1: Define

[Relation] {(-4, 1), (-2, 0), (8, -1)}

Step 2: Identify

According to the relation, our y-values are 1, 0, and -1. These values would encompass our range.

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2 years ago

Mary uses 56 inches of yarn to form a rectangle. if the rectangle is 4 inches wide what is it length

uranmaximum [27]

We know, area = length * width
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So, the length is 14

Hope this helps!

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2 years ago

Read 2 more answers