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natta225 [31]
3 years ago
11

Straight and vertical angles

Mathematics
1 answer:
Flauer [41]3 years ago
8 0

Answer: what's the question

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A woman jogs for 2 km at 8 km/h and then walks for 2 km
Artemon [7]

Answer:

  6 6/7 km/h

Step-by-step explanation:

The relations between speed, time, and distance are ...

  time = distance/speed

  speed = distance/time

__

So, to find the average speed, we need to know the total distance and the total time. The distances are given, but we need to compute the times.

  time jogging = (2 km)/(8 km/h) = 1/4 h

  time walking = (2 km)/(6 km/h) = 1/3 h

Then the woman's average speed is ...

  average speed = (total distance)/(total time) = (2 km + 2 km)/(1/4 h + 1/3 h)

  = (4 km)/(7/12 h) = 48/7 km/h

  = 6 6/7 km/h

3 0
3 years ago
What is 2 * -5/2 hghghghghghgh
Softa [21]
-5/2 is equivalent to -2.5, and if you multiply 2.5 by 2 you get 5, and you have to have the negative, so add that to the 5 and you get -5. Hope this helps!
3 0
3 years ago
Write down the unit digit for each of the following square first 78 pawer 2<br>​
Vladimir79 [104]

Answer:

4

Step-by-step explanation:

Since 78² then 8² = 64 which indicates 4 is the unit digit

6 0
3 years ago
four students spent 12 on school lunch.at this rate find the amount 10 students would spend on the same school lunch
zloy xaker [14]

Step 1: Set up the proportion

4/12 = 10/x

Step 2: Cross multiply to get

120 = 4x

Step 3: Divide all by 4 to get

30 = x

Answer: So in total, 10 students would spend $30 on lunch!



4 0
3 years ago
The ratio of boys to girls is 3:2. If there are a total of 20 children in Mrs. Nelson's class, how many are girls?​
Scilla [17]

12:8

So 12 boys

8 girls

8 0
2 years ago
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