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murzikaleks [220]
3 years ago
8

Which expression is equivalent to (x^2 -8) - (-2x^2+4)?​

Mathematics
1 answer:
Phoenix [80]3 years ago
3 0

Answer:

D) 3x^2 - 12

Step-by-step explanation:

Using PEMDAS;

There is no need to evaluate the part of the equation (x^2 - 8) because is no need to, as it is already in its simplest form.

We must evaluate the part of the equation continuing with, "- (-2x^2+4)," as it is not in its simplest form.

Evaluating "- (-2x^2+4)":

Step 1: Distributing the negative

Once distributing the negative symbol amongst the values within the parenthesis according to PEMDAS, we get "2x^2 - 4" as the product.

Step 2: Consider the rest of the equation to evaluate

Since the part of the equation is still in play here as it is a part of the original equation to be solved, we must evaluate it as a whole to get the final answer.

Thus,

x^2 -8 + 2x^2 - 4 = ___

*we can remove the parenthesis as it has no purpose, since it makes no difference.

Evaluating for the answer, we get,

x^2+2x^2 + (-8 - 4) = 3x^2 - 12

Hence, the answer is D) 3x^2 - 12.

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The diagram represents an enlargement of a rectangle by a scale factor of 4.
Tpy6a [65]

Answer:

D. 16 inches by 8 inches

Step-by-step explanation:

We have been given an image of two rectangles and we are asked to find the dimensions of the enlarged rectangle.

Since we have been given that the original rectangle is enlarged b a scale factor of 4, so to find the dimensions of enlarged rectangle we will multiply the dimensions of original rectangle by 4.

\text{Length of enlarged rectangle}=4\times 4\text{ inch}

\text{Length of enlarged rectangle}=16\text{ inch}

\text{Width of enlarged rectangle}=4\times 2\text{ inch}

\text{Width of enlarged rectangle}=8\text{ inch}

Therefore, the dimensions of enlarged rectangle are 16 inches by 8 inches and option D is the correct choice.

6 0
2 years ago
Read 2 more answers
Next odd number after 7006
Igoryamba
the\ odd\ numbers\ are\ those\ numbers\ that\ are\ not\ are\ divided\ by\ 2\\\\hte\ next\ odd\ number\ after\ 7006\ is\ 7006+1=7007
4 0
3 years ago
Read 2 more answers
Hey guys ♡
Marat540 [252]

Answer:

m = - 31

Step-by-step explanation:

Given

\frac{m-1}{2} - \frac{m-2}{3} = \frac{m-4}{7}

Multiply through by 42 , the LCM of 2, 3 and 7 , to clear the fractions

21(m - 1) - 14(m - 2) = 6(m - 4) ← distribute parenthesis

21m - 21 - 14m + 28 = 6m - 24

7m + 7 = 6m - 24 ( subtract 6m from both sides )

m + 7 = - 24 ( subtract 7 from both sides )

m = - 31

4 0
2 years ago
Read 2 more answers
Can someone help me fast -2 1/3 - (-5
lisov135 [29]

Answer:

your answer is positive 8/3

Step-by-step explanation:

When you are subtracting something by a negative number, it is the same as adding by a positive. For example, this equation would be solved like:

-2 1/3 + 5      

Instead of -2 1/3 - (-5)

Hope that helps!

5 0
2 years ago
Cany anybody give me the awnser to this?
Olegator [25]

Have a look at the attached image.

8 0
2 years ago
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