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Vikki [24]
3 years ago
11

Help i need to show my work too

Mathematics
2 answers:
ehidna [41]3 years ago
7 0
Bethany: 3 hours=20miles

susan: 3 hours=18 miles
Anettt [7]3 years ago
4 0
Susan goes 7.5 miles per hour.
Bethany goes 5 miles per hour.
Susan is faster.
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Lina20 [59]
The square root of 16 is 4
7 0
3 years ago
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If a polygon has an interior angle of 144, what kind of polygon is it? (find the # of sides first
ikadub [295]
<span>Each Interior Angle = <span>(<span>(Number of Sides -2) • 180 degrees<span>)<span> ÷ (Number of Sides)

Solving for number of sides
</span></span></span></span></span>
<span>Each Interior Angle / 180 = <span>(N -2) <span>/ (N)

144 / 180 = (n-2) / n

144 * n = 180n -360
360 = 36 n

n = 10 the number of sides

Source:
http://www.1728.org/polygon.htm

</span></span></span>
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3 years ago
What is the actual train length 54.4 meters what is the scale used to make the model
melisa1 [442]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
If 3x^2+3y^2=42 and xy =-15.Find the value (x-y)^2
Alexxandr [17]

Answer:

44

Step-by-step explanation:

Given, 3x^2 + 3y^2 = 42

=>3(x^2 + y^2) = 42 =>x^2 + y^2 = 42/3= 14

Thus,

= (x - y)^2

= x^2 + y^2 - 2xy

= (x^2 + y^2) - 2xy

= 14 - 2(-15)

= 14 + 30

= 44

4 0
3 years ago
If y equals -3x what does x equal?
guajiro [1.7K]
Do you have a picture of the question??
7 0
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