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stellarik [79]
3 years ago
13

A playground is rectangular with a length of 78 miles. If the area of the playground is 820 square miles, what is its width? Inp

ut your answer as a fraction.
Mathematics
1 answer:
Rudiy273 years ago
8 0

Answer:

10.5, 10\frac{1}{2}, or \frac{21}{2}

Step-by-step explanation:

To solve, you can use a variable (x) to represent the width.

The equation for area is A=L×W

So the Area is 820 and the length is 78.

820= 78w

Isolate the variable to solve.

w=10.5128....

If you round, it will be 10.5

10.5 as a fraction is 10\frac{1}{2} or \frac{21}{2}

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What does the line 5x+2y=8 look like?
cestrela7 [59]
The correct answer would be D. The plot of the line 5x+2y = 8 is slanted right downwards. To predict, we write the equation into slope-intercept form as follows:

y = mx + b        where m is the slope and b is the y-intercept form

5x + 2y = 8
y = -5x/2 + 4

As we can see, the slope is negative so the graph should slope to the right downwards.
5 0
4 years ago
What is the greatest common factor of 15 and 647? please help me​
ki77a [65]

Answer:

1

Step-by-step explanation:

The GCF of 15 : 1, 3, 5, 15

The GCF of 647 : 1, 647

The only GCF that was on both lists was 1

6 0
3 years ago
you use q line of best fir for a set of data to make a prediction about an unknown value. the correlation coefficient for your d
Ganezh [65]

Correlation coefficients are expressed by a number between -1 and 1.

If the value is -1 or 1 it indecates a perfect (negative and positive) correlation.

If the value is 0 indicates null correlation.

As the correlation value for you data set is -0.833 it is very close to the -1. It indicates a good correlation in the data. Then, the value you predicted is reasonably close to the actual value.

6 0
2 years ago
One solution, infinite solution, or no solution for 9x+8y=15 and 9x+8y=30
stira [4]
Best way to solve would be using Elimination Method. Here's how to solve.
9x + 8y = 15
9x + 8y = 30
To cancel out a variable multiply one equation with -1.
9x + 8y = 15
-1(9x + 8y = 30)
Distribute.
9x + 8y = 15
-9x - 8y = -30
Add both equations together.
0 = -15
So no solution would be your answer. I hope this helps love! :)
7 0
3 years ago
a map of a rectangle park has the length of 4inches and a with of 6 inches. It uses a scale of 1 inch every 30 miles. What is th
ratelena [41]

Answer:

720 mi²

Step-by-step explanation:

The map has a scale of 1 in: 30 mi, meaning that for every inch you see on the map, in the real-life location, it will measure 30 miles. So we can find the area of the park on the map and then turn it into miles using the scale:

Area of a rectangle:

A=bh

Replace the known values:

A=(4)(6)\\ A=24

The area on the map is 24 mi², we can turn it to miles using the scale by multiplying our result with 30:

A=(24)(30)\\ A=720

And last but not least, don't forget to put the unit!

4 0
3 years ago
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