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agasfer [191]
2 years ago
11

Cindy rode her scooter for 1/3 hour and traveled 2 1/6 kilometers. What is her average speed in kilometers per hour?

Mathematics
1 answer:
zavuch27 [327]2 years ago
8 0

Answer:

6 1/2km per hour

Step-by-step explanation:

1/1/3 = 1 × 3 = 3

2 1/6 × 3 = 6 1/2

6 1/2km/1hour

6 1/2km per hour

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What algebraic expression represents the phase “two times the quantity of a number minus 12”
MakcuM [25]

Answer:

2(n-12)

Step-by-step explanation:

3 0
3 years ago
The level of a lake in inches is falling linearly . The lake level is 452 inches on Jan 1 and then 378 inches on Jan 21. Find a
Marysya12 [62]

Answer:

y=-\frac{74}{21}x+452

Step-by-step explanation:

Given:

The level of a lake is falling linearly.

On Jan 1, the level is 452 inches

On Jan 21, the level is 378 inches.

Now, a linear function can be represented in the form:

y=mx+b

Where, 'm' is the rate of change and 'b' is initial level

x\to number\ of\ days\ passed\ since\ Jan\ 1

y\to Lake\ level

So, let Jan 1 corresponds to the initial level and thus b = 452 in

Now, the rate of change is given as the ratio of the change in level of lake to the number of days passed.

So, from Jan 1 to Jan 21, the days passed is 21.

Change in level = Level on Jan 21 - Level on Jan 1

Change in level = 378 in - 452 in = -74 in

Now, rate of change is given as:

m=\frac{-74}{21}

Hence, the function to represent the lake level is y=-\frac{74}{21}x+452

Where, 'x' is the number of days passed since Jan 1.

8 0
2 years ago
Write a word problem that can be solved using the equation 5x = 3x + 20
hram777 [196]
John has x amount of dogs. Solve for x to find how many dogs john has.
8 0
3 years ago
Layla painted 5/9 of a wall and Tim painted 6/7 of a wall. How much if the wall do they have left to paint?
tamaranim1 [39]

Answer:

54/63 so 9 of wall to paint left

Step-by-step explanation:

I think its 9 to paint

8 0
2 years ago
How do you find the rate of change
olga_2 [115]
If it's for a graph then I believe you just find the slope which you can do by taking two points and plugging them into this equation y-y
/
X-X

Example: (2, 4) and (6, 7) the first number is always x and the second is always y so if you plug those in the equation would look like this....

4-7
/
2-6

That would end up being
3
- ---- aka the rate of change
4


P.s. The slash and the four dotted lines together means division. Hope this helps
6 0
3 years ago
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