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Lisa [10]
3 years ago
14

Unit Rates: One person walks 9/20 miles in each 3/4 hour. Another person walks 8/15 miles in each 2/3 hour. Who is faster?

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
3 0

Answer:

Person 2

Step-by-step explanation:

Person 1 has a rate of .45 in 3/4 hour, and Person 2 has a rate of .53 in 2/3 hour. 2/3 is less than 3/4 and 0.53 is bigger than 0.45.

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Does a regular pentagon tessellate and why​
mariarad [96]

Answer:

No, a regular pentagon does not tessellate.

In a tessellation, all the angles at a point have to add to 360 degrees, as this means there is no overlap, nor are there gaps. To find the interior angle sum of a pentagon, we use the following formula:

(n-2)*180 (where n is the number of sides)

We plug in the number of sides (5) and get:

Angle sum = (5–2)*180

Angle sum = 3*180

Angle sum = 540

Regular pentagons have equal sides and equal angles, so to find the size of the interior angle of a pentagon, we divide the angle sum by 5 and get 108 degrees for every angle.

As I said before, the angles at a point need to add up to 360, so we need to know if 108 divides evenly into 360. If it does, the shape tessellates, and, if it doesn’t, the shape does not.

360/108 = 3.33333…

This means that a regular pentagon does not tessellate.

Hope this helps!

8 0
3 years ago
A container is leaking 0.42 liters of solution each hour. What is the overall change after 5 hours?
OLga [1]

Answer:

2.3 liters leaked

Step-by-step explanation:

0.42 * 5

6 0
3 years ago
Answer choices:
pychu [463]

Answer:

B. 15

Step-by-step explanation:

<em>The chances of </em><em>randomly</em><em> </em><em>selecting</em><em> </em><em>keys</em><em> </em><em>for</em><em> </em><em>a</em><em> </em><em>sports</em><em> </em><em>car</em><em> </em><em>or</em><em> </em><em>convertible</em><em> </em><em>is</em><em> </em><em>5</em><em>/</em><em>4</em><em>0</em><em> </em><em>since</em><em> </em><em>there</em><em> </em><em>are</em><em> </em><em>a</em><em> </em><em>total</em><em> </em><em>of</em><em> </em><em>5</em><em> </em><em>sports</em><em> </em><em>and</em><em> </em><em>convertible</em><em> </em><em>car</em><em> </em><em>keys</em><em> </em><em>and</em><em> </em><em>a</em><em> </em><em>total</em><em> </em><em>of</em><em> </em><em>4</em><em>0</em><em> </em><em>keys</em><em> </em><em>overall</em><em>.</em><em> </em><em>We</em><em> </em><em>then</em><em> </em><em>multiply</em><em> </em><em>that</em><em> </em><em>5</em><em>/</em><em>4</em><em>0</em><em> </em><em>by</em><em> </em><em>1</em><em>2</em><em>0</em><em> </em><em>because</em><em> </em><em>Sam</em><em> </em><em>randomly</em><em> </em><em>selects</em><em> </em><em>a</em><em> </em><em>key</em><em> </em><em>1</em><em>2</em><em>0</em><em> </em><em>times</em><em>.</em><em> </em>

5/40 × 120 = 15

4 0
3 years ago
Directions: Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).. Th
Anuta_ua [19.1K]

Answer

Find out the The numerical value of A - B  and the numerical value of B - A .

To prove

As given

The expression 113.47 - (43.72 - 26.9) represents A.

The expression 113.47 - (26.9 - 43.72) represents B .

Thus

A - B =  113.47 - (43.72 - 26.9)  - ( 113.47 - (26.9 - 43.72))

First solving the bracket terms.

A - B =  113.47 - (43.72 - 26.9)  -  113.47  + (26.9 - 43.72)

        = 113.47 - 16.82 - 113.47 - 16.82

        =  113.47  - 113.47 - 16.82 - 16.82

        = -33.64

Therefore the value of A- B is -33.64 .

Thus

B - A = 113.47 - (26.9 - 43.72) - (113.47 - (43.72 - 26.9))

First solving the bracket terms.

B - A = 113.47 - (26.9 - 43.72) - 113.47 + (43.72 - 26.9)

        =  113.47 + 16.82 - 113.47 + 16.82

        = 33.64

Therefore the value of the A - B is -33.64 and B - A is 33.64 .

6 0
3 years ago
Read 2 more answers
If parallelogram PQRS is dilated by a scale factor of 4 with a center of dilation at the origin, what is the area of parallelogr
victus00 [196]
The scale factor needs to be squared first before multiplying it to the area of parallelogram PQRS to find the area of dilation P'Q'R'S'. So in other words,

Area of P'Q'R'S' = 4² x Area of PQRS = 16 x Area of PQRS
4 0
3 years ago
Read 2 more answers
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