2 years ago

Atividade de Geometria (matemática respondam pfr

Mathematics

2 answers:

Sedaia [141]2 years ago

4 0

hope it would be helpful for you

dimulka [17.4K]2 years ago

3 0

Answer:

hope it would be helpful

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If 3x - 2y = 9 , 27x³- 8y³= 1377 , prove that xy = 4 <br><br><br><br>plzz answer this question...

solniwko [45]

Step-by-step explanation:

Here we are given that , the Value of

$3x - 2y = 9$
$27x^3 - 8y^3 = 1377$

And we need to find the prove that ,

$xy = 4$

We know a identity as ,

$(a-b)^3 = a^3-b^3-3ab(a-b)$

On cubing both sides of the given equation,

$(3x-2y)^3 = 9^3$

Simplify and then substitute ,

$27x^3-8y^3 -3(3x)(2y)(3x-2y ) = 729$

$1377 - 18xy (9) = 729$

$162xy = 1377-729$

$xy =\dfrac{648}{162}$

$xy = 4$

Hence Proved !

8 0

3 years ago

9 * 9 ^ 2 x + 3 equal 27 * 3 ^ x - 2

Amiraneli [1.4K]

3^2*3^2 (2x+3)=3^2+4x+6=3^4x+8

3^3*3^x-2=3^x+1

4x+8=x+1

3x=-7

x=-7/3

6 0

2 years ago

Janelle practices basketball every afternoon in the driveway each day her goal is to make four more baskets then she made the da

Alla [95]

She made 62 baskets by day 14. 4×13=52+10=62

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3 years ago

A toy company produces 1,000 toys per month. In January, 75 toys did not meet quality standards. The toy company generates a ran

erik [133]

Based on this sample, 100 toys will not meet standards.

There is 1 value that is 75 or lower in this simulation. This makes the experimental probability 1/10. 1/10(1000) = 100 toys for the month.

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3 years ago

Find the midpoint of line segment HX with coordinates H(-1,3) and X (7, -1).

viva [34]

Answer:

OK midpoint is actually really easy I got u

Step-by-step explanation:

X2+X1 divided by 2

Y2+Y1 divided by 2

7+-1/2 is 6.5

-1+3/2 is 0.5

(6.5,0.5)

5 0

2 years ago