3 years ago

Translate “the sum of x and one-half of x” into mathematical expression

Mathematics

1 answer:

Aleks [24]3 years ago

5 0

Answer:

X+ 0.5X or 1.5X

Step-by-step explanation:

the sum means that it want an addition problem. and so it is saying X + 1/2 (0.5)X which gives you 1.5X or you can leave it has X+0.5X

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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

5 is the result of 12 more than 3/4 of some number. What is the number?

iragen [17]

5= 12+3/4x, identify x

-7=3/4x, isolate x

-7(4/3)=x, -28/3=x

3 0

3 years ago

Homework help please I'll give you 10 points and brainliest

DaniilM [7]

Answer:

Step-by-step explanation:

Use 49 instead of 14 for 7²

Reason: 7² = 7 * 7 = 49

Not 14 as 7*2 = 14

6 0

2 years ago

25 POINTS!!!!

Mandarinka [93]

1 is D

2 is C

3 is B

4 is C

4 0

3 years ago

Select the best answer for the question.

wel

The answer should be B idk really

7 0

3 years ago