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3 years ago

Evaluate the expression 2x-2 for the value of x= -3

Mathematics

2 answers:

mina [271]3 years ago

6 0

2(-3) -2
-6-2
-8
The answer is -8. Hope this helps!

Sidana [21]3 years ago

5 0

Plug in -3 for x. 2(-3)-2=-8. Hope this helps! ;)

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Use a double angle identity to rewrite the formula r(Θ)=<img src="https://tex.z-dn.net/?f=1%2F16v%5E2sin%28theta%29cos%28theta%2

Artist 52 [7]

Answer:

1/32v²sin2θ

Step-by-step explanation:

Given the expression r(theta) = 1/16v²sinθcosθ

According to double angle of trigonometry identity;

Sin2θ = sin(θ+θ)

Sin2θ = sinθcosθ + cosθsinθ

Sin2θ = 2sinθcosθ

sinθcosθ = sin2θ/2 ... **

Substituting equation ** into the question

1/16v²sinθcosθ = 1/16v²(sin2θ/2)

1/16v²sinθcosθ = 1/2×1/16v²(sin2θ)

1/16v²sinθcosθ = 1/32v²sin2θ

Hence using the double angle identity, the equivalent expression is 1/32v²sin2θ

7 0

3 years ago

If f (x) = StartRoot x EndRoot + 12 and g (x) = 2 StartRoot x EndRoot, what is the value of (f – g)(144)

Luda [366]

The value of (f-g)(144) is 0

Step-by-step explanation:

We are given:

$f(x)=\sqrt{x}+12\,\,and\,\,\\ g(x)=2\sqrt{x}$

We need to find value of (f-g)(144)

We will put x=144 for both f(x) and g(x)

$(f-g)(144)=f(144)-g(144)\\=\sqrt{144}+12-(2\sqrt{12})\\=12+12-(2(12)\\=24-24\\=0$

So, the value of (f-g)(144) is 0

Keywords: Composite Functions

Learn more about Composite Functions at:

#learnwithBrainly

4 0

3 years ago

Read 2 more answers

Garth got 117 votes in the class election. 240 people voted. What percent of all the votes did he get? Which equation does NOT r

erastova [34]

Faci 240+117=357,sper ca team ajutat multumestemi

3 0

2 years ago

The product of two numbers is 40. If one of the numbers is 8/15, what is the other number?

Harman [31]

If one number is 8/15, you take the difference which 7/15.

5 0

2 years ago

<img src="https://tex.z-dn.net/?f=9%20-%20%20%5Csqrt%7B%20-%2064%7D%20" id="TexFormula1" title="9 - \sqrt{ - 64} " alt="9 - \s

siniylev [52]

$A)9-8i$

Explanation

$9-\sqrt[]{-64}$

Step 1

Let's remember that

A complex number is an object of the form

$a+bi$

where a and b are real numbers and

$\begin{gathered} i^2=-1 \\ i=\sqrt[]{-1} \end{gathered}$

$\begin{gathered} 9-\sqrt[]{-64} \\ 9-\sqrt[]{-1\cdot64} \\ 9-\sqrt[]{-1}\sqrt[]{64} \\ 9-8\sqrt[]{-1} \\ 9-8i \end{gathered}$

therefore, the answer is

$A)9-8i$

I hope this helps you

7 0

9 months ago