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shutvik [7]
4 years ago
12

The expression -3m - [2m + (5 - m)] + 7 was simplified as 2 - 4m.

Mathematics
2 answers:
likoan [24]4 years ago
6 0
<span>-3m - [2m + (5 - m)] + 7
= -3m - 2m - 5 + m + 7
= -4m + 2 
or
= 2 - 4m</span>
miv72 [106K]3 years ago
6 0

Question:  The expression -3m - [2m + (5 - m)] +7 was simplified as 2 - 4m.  Without simplifying, explain how you can show that it has been simplified correctly.

Answer may include:

If the expression has been simplified correctly, then the expressions will be equivalent.

The expressions will have the same value when numbers are substituted in for the variable m.

Choose a value for m and substitute in to both expressions.

Simplify each expression using the order of operations and show they are the same value.

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What is 4x(5x-2)=20x-2
Zanzabum

Answer: x = 1.32 and x= 0.076

Step-by-step explanation:

4x(5x-2) = 20x-2

20x^2-8x = 20x-2

20x^2-8x-20x+2=0

20x^2-28x+2=0

Using quadratic equation

x = (-b +or- √(b^2-4ac))/2a

a =20, b=28, c= 2

Substitute into the equation

x= (7+√39)/10. = 1.32

x = (7-√39)/10 = 0.076

7 0
3 years ago
What is the slope of this line?​
Fed [463]

Answer:

(-5,4)

Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
Simplify the following expression.
Rzqust [24]

Step-by-step explanation:      

<u>Step 1: Add the numbers: 9.5 +6.2 = 15.7</u>

=8.6\left(15.7-3.5^2\right)

3.5^2=12.25

=8.6\left(15.7-12.25\right)

<u>Step 2: Subtract the numbers: 15.7 - 12.25 = 3.45</u>

= 3.45X 8.6

<u>Step 3: Multiply the numbers: 8.6 × 3.45 = 29.67</u>

<u />=29.67<u />

<u />

- To solve this equation, the first step is to add the numbers 9.5 + 6.2 into the equation and it will lead to 15.7 as the number for step one.

- To solve this equation, the second step is to subtract the numbers 15.7 - 12.25 into the equation and it will lead to 3.45 as the answer.

- To solve this equation, the third step is to multiply the numbers 8.6 x 3.45 into the equation and it will lead 29.67 as the final answer for the whole equation.

Answer:      

=29.67

 

Hope this helps.

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2 years ago
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Eric took a test with 15 questions. he answered 2/5 of the questions correctly, how many did he get wrong?
givi [52]

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