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3 years ago

3 by 8 multiply 100

Mathematics

2 answers:

Fittoniya [83]3 years ago

8 0

Answer:

37.5

Step-by-step explanation:

3 ÷ 8 = 0.375

0.375 × 100 = 37.5

adelina 88 [10]3 years ago

5 0

Answer:

2 400‬ but i dont know if it is right sry

Step-by-step explanation:

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A quadrilateral has congruent diagonals. It is probably a Square

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3 years ago

What is a positive times a negative

sergejj [24]

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Step-by-step explanation:

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P(X > 10), n = 15, p = 0.7

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Step-by-step explanation:

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3 years ago

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

SashulF [63]

ANSWER

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

EXPLANATION

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

How can tell before you divide 387 by 4, that the first digit of the quotient in in the tens place?

iVinArrow [24]

You can tell before you divide 387 by 4, that the first digit of the qoutient is going to be in tens place, because 3 can't go into 4.

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3 years ago

3 by 8 multiply 100​

3 by 8 multiply 100