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kifflom [539]
2 years ago
13

Perform the indicated operation 1. (12 + 3) - 7 = N

Mathematics
1 answer:
lubasha [3.4K]2 years ago
8 0

Answer:

N = 8

Step-by-step explanation:

(12 + 3) - 7 = N

=> N = (12 + 3) - 7

=> N = 15 - 7

=> N = 8

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How do i do this help
Ratling [72]
I don't know if u can see it, but there.
X=12
Y=15
Z=20

5 0
3 years ago
Esther drove to work in the morning at an average speed of 45 miles per hour. She returned home in the evening along the same ro
nydimaria [60]
The key is Esther travelled the same distance - x - in both her morning and evening commute.

45(time she took in the morning, or p) = x
30(time she took in the evening, or q) = x

Therefore 45(p) = 30(q), or divide both sides by 5 and get 9(p) = 6(q). I know you can divide it further, but these numbers are small enough and it's not worth the time.

Since the whole trip took an hour, (p + q) = 60min, and so, p = 60-q.

Therefore 9(60-q) = 6q or 540-9q = 6q. So 540 = 15q, which makes q = 36. If q = 36, then by (p+q)=60, p (the time she took in the morning) must equal 24.

45 miles per hour, her speed in the morning, times (24/60) hours, her time, makes 18 miles travelled in the morning. If you check, 30 miles per hour times (36/60) hours also makes 18 miles in the evening.

<span>Hope that makes a little sense. And I also hope it's right</span>
7 0
3 years ago
Read 2 more answers
Calculate the mean of: 4.6, 3, 8.1, 9, 12, 3, 9, 3.5, 7, 3.<br> 6.22<br> 5.8<br> 9<br> 3
harkovskaia [24]

Answer:

7.3

Step-by-step explanation:

The mean of 4.6, 3, 8.1, 9, 12, 3, 9, 3.5, 7, 3. 6, 22 , 5.8 , 9 , 3 is 7.3

3 0
3 years ago
Read 2 more answers
ANOTHER ONE PEOPLE!!! ANOTHER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Tasya [4]

Answer:

10.3

10,7

Step-by-step explanation:

4 0
2 years ago
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#4 Find the area of the figure below​
hram777 [196]

Answer:

Im pretty sure the answer is 327.96

Step-by-step explanation:

8 0
3 years ago
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