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avanturin [10]
3 years ago
9

HELPPP!!! WILLBEMARKEDBRAINLIEST 30 POINTSS

Mathematics
1 answer:
Mars2501 [29]3 years ago
5 0

Answer:

Step-by-step explanation:

Base + 4 triangles

(18.4)(27.6) + 2(½×27.7×17.6) + 2(½×18.4×20.4)

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Hitman42 [59]

Answer:45 mi/h

Step-by-step explanation:

Recall: Speed = distance / time

Let the time taken for the morning journey be t_{1} and the time taken for the afternoon journey be t_{1} ,and the distance covered be d

that means for the first journey,

30 = \frac{d}{t_{1}}

d = 30 t_{1}

Also for the afternoon journey,

d = 60 t_{2}

Equating the two , since the same distance is being covered , we have

30 t_{1} = 60 t_{2}

that is

t_{1} = \frac{60t_{2}}{30}

t_{1} = 2 t_{2}

Also ,

total distance covered = 30 t_{1} + 60 t_{2}

Average speed = total distance / total time

 = 30 t_{1} + 60 t_{2} / t_{1} +t_{2}

  Recall that   t_{1} = 2 t_{2} , substitute this  into the formula for average speed , then we have

Average speed = 30(2t_{2}) +60 t_{2} / 3t_{2}

Average speed = 120t_{2} / 3t_{2}

Therefore :

Average speed = 40 mi/hr

                           

4 0
3 years ago
A trapezoid has bases of lengths 13 cm and 17 cm. The
Vedmedyk [2.9K]

Answer:

135 cm²

Step-by-step explanation:

The area (A) of a trapezoid is calculated as

A = \frac{1}{2} h(a + b)

where h is the height and a, b the parallel bases

Here h = 9, a = 13 and b = 17 , thus

A = \frac{1}{2} × 9 × (13 + 17)

   = 0.5 × 9 × 30

   = 135 cm²

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The answer is B on multiple choice
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A crate of pears that usually costs $50 is on sale for 10% off. What is the sale price for the crate of pears?​
lorasvet [3.4K]
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Explaining:
10% of 50
= 10%=10/100 = 0.1
= 0.1 (x) times 50
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3 0
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Sasha's family traveled 2/7 of the distance to her aunt’s house on Saturday. They traveled 4/5 of the remaining distance on Sund
Alexxandr [17]

The fraction of the total distance Sasha traveled to her aunts house is 6/7

Step-by-step explanation:

4 0
2 years ago
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