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3 years ago

28,18,8,-2 is this arithmetic ?

Mathematics

1 answer:

Tresset [83]3 years ago

3 0

Answer:

yes it is arithmetic because:

28 - 10= 18

18 - 10= 8

8 - 10= -2

it keeps decreasing by the same number (10). Therefore, it is arithmetic.

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Explanation on How to answer what is the density of an object that has a mass of 73,430 and the volume of 7 m3

scZoUnD [109]

Answer:

Density = 10,490 g/m³

Step-by-step explanation:

Density = mass ÷ volume

here mass = 73,430 g

volume = 7 m³

density = 73,430 ÷ 7

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Density = 10,490 g/m³

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3 years ago

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3 years ago

How can I use the figure to find the exact value of sin 2theta?

Iteru [2.4K]

Answer:

sin(2θ) = 24/25

Explanation:

In order to find the value of sin 2θ, first, recall the double-angle formula for sine.

$\sin 2\theta=2\sin \theta\cos \theta$

From the right-triangle:

$\begin{gathered} \sin \theta=\frac{\text{Opposite}}{\text{Hypotenuse}}=\frac{3}{5} \\ \cos \theta=\frac{\text{Adjacent}}{\text{Hypotenuse}}=\frac{4}{5} \end{gathered}$

Substitute these values into the double-angle formula obtained earlier.

$\begin{gathered} \sin 2\theta=2\sin \theta\cos \theta \\ =2\times\frac{3}{5}\times\frac{4}{5} \\ =\frac{24}{25} \end{gathered}$

The exact value of sin(2θ) is 24/25.

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1 year ago

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Anna007 [38]

1. She is incorrect because in step 3, she did not make sure both sides of the equation have the same base.

2. Correct

3. Correct

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1 year ago