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3 years ago

Convert the fraction 1/40 to a decimal form

Mathematics

2 answers:

Natasha_Volkova [10]3 years ago

8 0

Answer:0.025

Step-by-step explanation:

AnnyKZ [126]3 years ago

5 0

Answer: 0.025

1 divided by 40 = 0.026

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Please help me

lisabon 2012 [21]

Answer:

Step-by-step explanation:

3+2x = 4x-7

3+7=4x-2x

x=5

3 0

2 years ago

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Convert the Cartesian equation (x 2 + y 2)2 = 4(x 2 - y 2) to a polar equation.

SashulF [63]

<u>ANSWER</u>

${r}^{2} = 4 \cos2\theta$

<u>EXPLANATION</u>

The Cartesian equation is

${( {x}^{2} + {y}^{2} )}^{2} = 4( {x}^{2} - {y}^{2} )$

We substitute

$x = r \cos( \theta)$

$y = r \sin( \theta)$

and

${x}^{2} + {y}^{2} = {r}^{2}$

This implies that

${( {r}^{2} )}^{2} = 4(( { r \cos\theta) }^{2} - {(r \sin\theta) }^{2} )$

Let us evaluate the exponents to get:

${r}^{4} = 4({ {r}^{2} \cos^{2}\theta } - {r}^{2} \sin^{2}\theta)$

Factor the RHS to get:

${r}^{4} = 4{r}^{2} ({ \cos^{2}\theta } - \sin^{2}\theta)$

Divide through by r²

${r}^{2} = 4 ({ \cos^{2}\theta } - \sin^{2}\theta)$

Apply the double angle identity

$\cos^{2}\theta -\sin^{2}\theta= \cos(2 \theta)$

The polar equation then becomes:

${r}^{2} = 4 \cos2\theta$

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3 years ago

Five notebooks cost $20. At this rate, how much would 2 notebooks cost

fenix001 [56]

2 notebooks* ($20/ 5 notebooks)= $8.
(Note that the unit cancels out so you get the answer)

Final answer: $8~

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3 years ago

Given that v = (5,-4, 4) and w = (9-2,7) , evaluate v • w.

yuradex [85]

Answer:

Step-by-step explanation:

Given

u = (x₁, y₁, z₁ ) and v = (x₂, y₂, z₂ ) then the dot product is

u • v = (x₁ x₂ ) + (y₁ y₂ ) + (z₁ z₂ )

Then

v • w

= (5 × 9) + (- 4 × - 2) + (4 × 7)

= 45 + 8 + 28

= 81 → a

4 0

3 years ago

HELP ASAP PLEASE!!!!!!!1

frozen [14]

I’m not sure but the third side it’s supposed to be more than the 5 and 7 and I think that the third side it’s 12 so the answer it’s A I think

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3 years ago

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Convert the fraction 1/40 to a decimal form​

Convert the fraction 1/40 to a decimal form