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stepladder [879]
4 years ago
10

Evaluate f(x) = 5x2 - 4x - 9 for f(-2)

Mathematics
1 answer:
Svetllana [295]4 years ago
8 0

Answer:

99

Step-by-step explanation:

5x^2 -4x -9

5(-2)^2 -4(-2) -9

-10^2 +8 -9

100-1

99

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What algebraic rule did you use to preform this<br> translation????
Law Incorporation [45]

Answer:

In geometry, a transformation is an operation that moves, flips, or changes a shape (called the preimage) to create a

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2. The second notation is a mapping rule of the form (x, y) → (x−7, y+5). This notation tells you that the x and

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Step-by-step explanation:

5 0
3 years ago
The area of a rectangle is expressed as x4 - 9y2. What are the possible dimensions of the rectangle?
AnnyKZ [126]

This is a stupid question.  The teacher who asked this needs to go back to school.

A = x⁴ - 9y²

That's going to be a number.  As long as it's positive we can choose any length for our rectangle L and we can compute the width by W=A/L.   So the correct answer is the dimensions are L by  (x⁴ - 9y²)/L.

They don't want the correct answer.  They want you to factor this expression.  We'll do it, but don't believe for a second this factoring somehow constrains the possible dimensions of some rectangle.

We use the difference of two squares, a²-b² = (a+b)(a-b)

A = x⁴ - 9y² = (x²)² - (3y)² = (x²+3y)(x²-3y)

Answer: x²+3y  by  x²-3y

5 0
3 years ago
You spin the spinner twice,
Lelu [443]

Answer:

\frac{2}{3}

3 0
3 years ago
A jar contains 11 red marbles, 12 blue marbles, and 6 white marbles. Four marbles from this jar are selected, with each marble b
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Total Marbles: 29
Option:
(B/W) • (B/W) • (B/W) • (B/W) • (R)
18/29 • 18/29 • 18/29 • 18/29 • 11/29
= Exact Form: 1154736/20511149
= Decimal Form: 0.05629796
8 0
2 years ago
A 7-foot ladder is leaned against a building in such a way that the bottom of the ladder is 4 feet from the base of the wall. Fi
kirza4 [7]
Θ=<span><span>180<span>cos<span>−1</span></span><span>(<span>47</span>)/</span></span>π</span>=55.1501<span> degrees</span>
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3 years ago
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