2 years ago

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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2 years ago

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.

AysviL [449]

Answer:

2 hours

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...

Flura [38]

Answer:

6:30

Step-by-step explanation:

20+16+6= 42

72-42=30

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Answer:

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