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2 years ago

Which expressions represent the difference of exactly two expressions? Choose 3 answers: Choose 3 answers: (Choice

Mathematics

1 answer:

Ket [755]2 years ago

3 0

Solution

To find out which expressions represent the difference of exactly

two expressions

a) 6(x+7) - 2

This can be simplified as

6x + 42 - 2

6x + 40

Clearly this does not represent difference of the two

expressions .

b) -2j

Clearly this represents a single expression , this does not represent

a difference of 2 expression .

c) 4f - 2g

Here we have 2 different expressions 4f and 2g

Difference of these 2 expressions are 4f - 2g

Hence , this option represent difference of exactly two

expression

d) 3xyz - 10

3xtz - 10 represnts a single expression

Here we have a single expression

Therefore it does not represent difference of exactly 2

expression .

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Y = – 3

KonstantinChe [14]

The best approximation for the solution to this system of equations is (-2.2,-3)

Option C is correct.

Step-by-step explanation:

Solving the system of equations to get the exact value of x:

$y = -3\\y = x-0.8$

Let

$y = -3\,\,eq(1)\\y = x-0.8\,\,eq(2)$

Putting value of y from eq(1) into eq(2)

$-3=x-0.8$

$x=-3+0.8$

$x=-2.2$

So, Value of x is -2.2

The best approximation for the solution to this system of equations is:

x=-2.2 and y = -3

(-2.2,-3)

Option C is correct.

Keywords: System of equations

Learn more about system of equations at:

#learnwithBrainly

6 0

3 years ago

Read 2 more answers

Factor 64 - P.<br> (8 - x(8 - x)<br> (8 + x (8 - x)<br> (X + 8)(x-8)

muminat

Question:

Factor $64-x^2$

(8 - x)(8 - x)

(8 + x) (8 - x)

(X + 8)(x-8)

Answer:

Option B: $(8+x)(8-x)$ is the factor

Explanation:

Given that the expression is $64-x^2$

We need to find the factor of the given expression.

Let us rewrite the expression as $8^2-x^{2}$

Since the expression is of the form $a^2-b^2$ , let us use the identity $a^2-b^2=(a+b)(a-b)$

where a = 8 and b = x

Substituting the values in the identity, then the expression can be written as

$8^2-x^{2}=(8+x)(8-x)$

Thus, the factor of the expression is $(8+x)(8-x)$

Hence, Option B is the correct answer.

4 0

2 years ago

Find each rate and unit rate. A. 420 miles in 7 hours. B 360 customers in 30 days. C 40 meters in 16 sec. part d $7.96 for 5 pou

shtirl [24]

a. 60 miles/1 hour because 420/7

b. 12 customers/1 day because 360/30

c. 2.5 meters/1 sec because 40/16

d. $1.59/1 lb because 7.96/5

3 0

3 years ago

Read 2 more answers

Help Plz 15 Points And brainliest!!!

madam [21]

Answer:

-2

Step-by-step explanation:

Hope this was helpful

6 0

3 years ago

Read 2 more answers

Subtract -7x^2+4x+2−7x 2+4x+2 from x^2-3x 2 −3.

expeople1 [14]

Answer:

The answer is 4

Step-by-step explanation:

4 0

3 years ago