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sergeinik [125]
2 years ago
5

Help......................................

Mathematics
2 answers:
Sergeu [11.5K]2 years ago
3 0
Yep that’s correct






...
Angelina_Jolie [31]2 years ago
3 0
That's correct but you might wanna show your work just in case the teacher ask how you got your answer
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Prove algebraically that (m + 2)2 – m 2 – 12 is always a multiple of 4
Julli [10]

Answer:

(m + 2)^{2} - m^{2}  - 12 = 4(m - 2)

Step-by-step explanation:

Step 1:

Write the expression

(m+2)^{2} - m^{2}  - 12

Step 2: Expand (m + 2)^{2}

(m+2)^{2} - m^{2} - 12\\(m+2)(m+2) - m^{2}  - 12\\m^{2} + 2m + 2m + 4 - m^{2}  - 12

Step 3: Collect similar terms

m^{2}  - m^{2}  + 4m + 4 - 12\\4m - 8

Step 4: Factor 4 out of the expression to prove that the expression is a multiple of 4.

Therefore\\4m - 8 = 4(m - 2)\\Hence,\\(m+2)^{2}  - m^{2} -  12 is a multiply of 4 because the expression is equal to 4(m-2)

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A car travels 120 miles at the speed of 48 miles per hour. Find the time taken for the journey using the formula d = rt.
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Step-by-step explanation:

Car travels from A to B at 60 miles/hour. Time of travel = 120/60 = 2 hour. Average speed of round trip = (120+120)/(2+3) = 48 miles per hour.

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2 years ago
This is probably easy to answer but I’m tired soo...
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6:30

Step-by-step explanation:

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