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weeeeeb [17]
3 years ago
12

1Ellen says that 1 2/5 equals 5 ÷7 Is shecorrect? Explain.​

Mathematics
2 answers:
goblinko [34]3 years ago
4 0

Answer:

She isn't correct.

Step-by-step explanation:

If you think about it, 5÷7 is the same thing as \frac{5}7}. \frac{5}{7} does not equal 1 2/5, since 1 2/5 is a mixed number.  Hope that helped!

Anastasy [175]3 years ago
3 0

No she is not because 1 2/5 is a bigger number than 5/7.

1 2/5 in decimal form is 1.4, and 5/7 in decimal form is .714.

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As low tide came in, the ocean dropped by a rate of 12 inches every 3 minutes. Write a rational # describing this rate.
RSB [31]

You can write every speed as the ratio between the space and time, so in this case you have

\dfrac{12\text{ inches}}{3\text{ minutes}} = 4\ \dfrac{\text{inches}}{\text{minute}}

8 0
3 years ago
Chen rode his skateboard 3 1/4 miles in 1/3 of an hour. What was his average speed in miles per hour
sdas [7]

Answer:

9.75 mph

Step-by-step explanation:

3 1/4 ÷ 1/3 = 9 3/4

7 0
3 years ago
Sofia and Diego drive to work. Sofia drives 72 miles in 1.5 hours. Diego drives 126 km in 2 hour 30 min. Work out the difference
sdas [7]

Answer:

26.4 km/hr

Step-by-step explanation:

Sofia and Diego drive to work.

For Sofia

We convert miles to km

Sofia drives 72 miles in 1.5 hours.

1 mile = 1.6 km

72 miles = x

x = 72 × 1.6 km

x = 115.2 km

We find the speed in km/hr

Speed = Distance /Time

= 115.2km/1.5 hours

= 76.8 km/hr

For Diego

Diego drives 126 km in 2 hour 30 min.

Speed = Distance/Time

Time = 2 hour 30 min = 2.5 hours

Speed = 126km/2.5 hours

= 50.4 km/hr

The difference between their average speeds in km/h is calculated as:

76.8 km/hr - 50.4 km/hr

= 26.4 km/hr

5 0
2 years ago
luke has $1.40 in quarters and nickels. he has 2 more quarters than nickels. how many coins of each type does he have?
Ainat [17]

Answer:

3 nickels and 5 quarters

Step-by-step explanation:

Let n = number of nickels

q = number of quarters

q = n+2

.25q + .05n = 1.40

Using the first equation and replacing q in the second equation

.25( n+2) + .05n = 1.40

Distribute

.25n+.50 +.05n = 1.40

Combine like terms

.30n +.5 = 1.40

Subtract .5 from each side

.3n +.5-.5 = 1.40-.4

.3n = .9

Divide by .3

.3n/.3 = .9/.3

n = 3

q = n+2

q=5

8 0
3 years ago
Read 2 more answers
You are graphing y < 2x + 1. What type of line do you use and where do you shade?
bazaltina [42]
Since there isn't a line under the < sign, this means that we used a dotted or dashed line. The dotted or dashed line indicates that we do NOT include the boundary as part of the solution set. 

Since y is isolated and we have a less than sign, this means we shade below the dashed/dotted boundary line. Specifically, the boundary line is the graph of y = 2x+1. This boundary line goes through (0,1) and (1,3). Again, points on this boundary line are NOT part of the solution set. 

So in summary we have:
A dashed or dotted boundary line
The shaded region is below the dashed/dotted boundary line.
3 0
3 years ago
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