Solve for n: 6n+12=12

Answers

Answer 1

Answer: 6n+12=12
subtract 12 from both sides
6n=0
since 6 does not equal 0 and 0 times any other number=0
n=0

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Perform the indicated operation and write in standard form 5i+(-9-i)

Answers

Since the sign before the parentheses is a + , we can just remove the parentheses.

5i + (-9 - i) = 5i - 9 - i = -9 + 4i

$5i+(-9-i)=\n 5i-9-i=\n -9+4i$

5/6+3/7 in simplest form

Answers

5/6 + 3/7

Common denominator is needed.

5/6 = 35/42
3/7 = 18/42

Now add

35 + 18 = 53

53/42
53 - 42 = 11

1 and 11/42

$(5)/(6) + (3)/(7) =\n\n (35)/(42) + (18)/(42) =\n\n (35+18)/(42) =\n\n (53)/(42) =\n\n{\boxed{(53)/(42)\ or\ 1 (11)/(42)}$

Adam tried to compute the average of his 7 test scores. He mistakenly divided the correct sum of all of his test scores by 6, which yielded 84. What is Adam’s correct average test score?

Answers

Adam got the sum of his grades right, but he divided that correct figure by 6, getting 84 Before that division, the sum of his grades must have been 84 * 6, or 504. He should have divided 504 by 7, getting 72. Answer: His correct average test score is 72.

My sister is 14 years old. my brother says that his age minus 12 equal to my sister's age.

Answers

Answer:

26 years old.

Step-by-step explanation:

First lets write an expression for this problem.

That will be 14 + 12 = x

You will do this because it says how the persons sister's age is 14. And the brother says that his age is 12 minus equal to his sister's age. So that's why you use that expression.

So 14 + 12 will give yo 26.

So that means the brother is 26 years old.

3. Through what angle does the minute hand of a clock turn in 12 minutes of time?

Answers

60 minutes=360º
Then:

360º---------------60 minutes
x--------------------12 minutes

x=(360º * 12 minutes) / 60 minutes=72º

answer: 72º

60 minutes=360º
Then:

360º---------------60 minutes
x--------------------12 minutes

x=(360º * 12 minutes) / 60 minutes=72º

answer: 72º

Pls help with number 16...

Answers

a. Area of a square= side length squared
=> A= (x-3)^2
= x^2-6x+9
b. Area of rectangle= larger side length* smaller side length
=> A= x(x-5)
= x^2-5x
c. If both areas equal then expressions for areas equal as well.
x^2-5x= x^2-6x+9
=>x=9

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