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3 years ago

What is the answer of this question?

Mathematics

2 answers:

stira [4]3 years ago

5 0

Answer is d I believe

Troyanec [42]3 years ago

3 0

Answer:

d x / d y = -x2 - 2 y + 8 / 2 x y + 6

Step-by-step explanation:

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3. 2x – y = -7<br> 4x – y = -4<br> A) (-1.5, 4)<br> B) (1.5, 10)<br> C) (4, -1.5)<br> D) (-1.5, -2)

marishachu [46]

Multiply first equaton by -1 and add to first

-2x+y=7
<u>4x-y=-4 +</u>
2x+0y=3

2x=3
divide 2
x=3/2

sub
2x-y=-7
2(3/2)-y=-7
3-y=-7
minus 3
-y=-10
negative 1 times both sides
y=10

(3/2,10)
(1.5,10)

B is ansre

7 0

3 years ago

Can someone plz help me really fast

UNO [17]

Between 15 and 20 miles per gallon.

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3 years ago

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PLZ HELP BRAINLIEST<br> Which of the following graphs could represent a function?

Serhud [2]

Answer:

Step-by-step explanation:

all other graphs couldnt work because their x axis do not pass the vertical line test.

please give brainliest

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3 years ago

Evaluate: 71 − b, if b is 27.

LUCKY_DIMON [66]

Evaluate: 71-b, if b is 27 the answer is 44

7 0

2 years ago

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Which are sums of perfect cubes? Check all that apply. 8x6 27 x9 1 81x3 16x6 x6 x3 27x9 x12 9x3 27x9.

Black_prince [1.1K]

The equations which are sums of perfect cubes are as follows;

$\rm 8x^6+27x^9+1$

$\rm x^6+x^3$

$\rm 27x^9+x^{12}$

<h3>Perfect cubes;</h3>

Perfect cubes are the numbers that are the triple product of the same number.

We have to determine

Which are sums of perfect cubes?

1. The given equation is $\rm 8x^6+27x^9+1$ .

The equation can be written as;

$\rm 8x^6+27x^9+1\\\\2^3(x^2)^3+3^3(x^3)^3+1^3$

All the terms in the expression are can be represented as perfect cubes.

2. The given equation is $\rm 81x^3+16x^6$ .

The equation can be written as;

$\rm 81x^3+16x^6\\\\9^2x^3+4^2(x^2)3$

In this, all the terms are not perfect cubes, some of them are squares.

3. The given equation is $\rm x^6+x^3$ .

The equation can be written as;

$\rm x^6+x^3\\\\(x^2)^3+x^3$

All the terms in the expression are perfect cubes.

4. The given equation is $\rm 27x^9+x^{12}$ .

The equation can be written as;

$\rm 27x^9+x^{12}\\\\3^3(x^3)^3+(x^4)^3$

All the terms in the expression are perfect cubes.

5. The given equation is $\rm 9x^3+27x^9$ .

The equation can be written as;

$\rm 9x^3+27x^9\\\\3^2x^3+3^3(x^3)^3$

In this, all the terms are not perfect cubes, some of them are squares too.

To know more about perfect cubes click the link given below.

brainly.com/question/4701925

5 0

2 years ago

Read 2 more answers