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4 years ago

What do you get when using the Quadratic formula for the equation x^2+4=20?

Mathematics

1 answer:

wolverine [178]4 years ago

4 0

$x^{2} +4=20$
$x^{2} =20-4$
$x^{2} =16$
$x= \sqrt{16}$
$x=4$

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2 years ago

Metal A has a density of 12.7 g/cm3.

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Using the given information, the density of metal B is 8.58 g/cm³

<h3>Calculating density </h3>

From the question, we are to determine the density of metal B

From the given information,

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∴ Mass of metal B in the alloy = 90 g - 55 g = 35 g

Now, we will determine the volume of metal A in the alloy

Using the formula,

Density = Mass / Volume

∴ Volume = Mass / Density

Volume of metal A in the alloy = 55/12.7

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Then, we will determine the volume of the alloy

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Volume of the alloy = 8.41 cm³

∴ Volume of metal B in the alloy = 8.41 cm³- 4.33 cm³

Volume of metal B in the alloy = 4.08 cm³

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Density = mass / volume

Density of metal B = 35 / 4.08

Density of metal B = 8.58 g/cm³

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Learn more on Calculating density here: brainly.com/question/13986137

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Consider the function. What is the y-intercept of f–1(x)? –16 –12

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<h2>Explanation:</h2><h2></h2>

Hello! Remember you have to write clear questions in order to get good and exact answers. Here, I'll assume the function as:

$f(x)=x^2+2x-16$

The y-intercept of a function is the point at which the graph of the function touches the y-axis. This occurs when we set $x=0$ . In other words, we define the y-intercept (let's call it $b$ as:

$b=f(0)$

Setting $x=0$ in our function we have:

$b=f(0)=(0)^2+2(0)-16 \\ \\ \boxed{b=f(0)=-16}$

So <em>in this context the y-intercept is -16</em>

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3 years ago