3 years ago

What is the weight in grams and ounces

Mathematics

1 answer:

stellarik [79]3 years ago

6 0

9.032000 grams

0.319 ounces

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If 3x - 2y = 9 , 27x³- 8y³= 1377 , prove that xy = 4 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

2 years ago

Martin thinks of two numbers. He says, "The Highest Common Factor (HCF) of my two numbers is 6 The Lowest Common Multiple (LCM)

sergiy2304 [10]

Answer:

30 and 42

Hope this helps

3 0

2 years ago

an official playing field (including end zone) for the indoor football league has a length 39 yd longer than its width. the peri

ch4aika [34]

Answer:

Step-by-step explanation:

39+39 = 78

162 - 78 = 2 lengths =84

84/2 = 42

5 0

2 years ago

2y – 9x = 4 ......................

alekssr [168]

Answer:

y=9/2x+2

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

2x -3y =2 x = 6y - 5

never [62]

2(6y - 5) - 3y = 2
12y - 10 - 3y = 2
9y - 10 = 2
9y = 12
y = 4/3, or 1 1/3
2x - 3(4/3) = 2
2x - 12/3 = 2
2x - 4 = 2
2x = 6
x = 3

7 0

2 years ago