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belka [17]
3 years ago
15

What does -2/3÷2 1/4 equal on khan academy?

Mathematics
1 answer:
Ivenika [448]3 years ago
6 0
The answer would be -8/27 I believe
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Find the slope (m) and the y-intercept (b) of the given line on the graph.
Marysya12 [62]
M=1 b=0
For M: Using the formula to find slope y2-y1/ x2-x1 we can select 2 sample points in this case I’ll use (1, 1) and (2, 2). Inserting those into the formula we get 2-1/ 2-1 which, after subtracting, is 1/1 or 1.
B: The point where the line crosses the y-axis is the origin or (0, 0)
4 0
4 years ago
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
Is 5a-9b+a-6b equal to 6a-15?
pashok25 [27]
Surely not;
5a+a-9b-6b
6a-15b
So,
5a-9b+a-6b=6a-15b
It's not equal to 6a-15


7 0
3 years ago
What is the expanded form of the decimal 444.3? A) (4 x 100) + (4 x 10) + (4 x 1) + (3 x 1 10 ) B) (4 x 100) + (4 x 10) + (4 x 1
Tpy6a [65]

444.3 = (4 x 100) + (4 x 10) + (4 x 1) + (3 x 1 /10 )

Answer

A. (4 x 100) + (4 x 10) + (4 x 1) + (3 x 1 /10 )


6 0
3 years ago
Read 2 more answers
If a trucker changes the oil every 10,000 miles, and he starts the year with a fresh oil change, how many times will he change t
Wittaler [7]

he will change his oil 16 times because 160,000 divided by 10,000 equals 16

8 0
3 years ago
Read 2 more answers
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