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Juli2301 [7.4K]
3 years ago
11

HELP PLZZ!!???? Determine the rate at which Zayna drives for 3 hours at a rate of 44 miles per hour. Later, she drives for anoth

er 2 hours so that her total distance traveled for the day is 240 miles. What is the solution set for 3 ( 44 ) + 2r = 240 given the replacement set ( 52, 53, 54, 55 ) ?
a. 52

b. 53

c. 54

d. 55




EXPLAIN UR ANSWER
Mathematics
2 answers:
ludmilkaskok [199]3 years ago
7 0

Answer:

C. or 54

Step-by-step explanation:

Assuming we are trying to find r then you would get 3*44 because distance=speed*time so distance is for the 3 hour time is 132 miles. To find the reaming distance you do 240-132= 108 so then we know distance/time=speed so 108/2=54 so the speed is 54 mph

Effectus [21]3 years ago
4 0

Answer:

C i took the test

Step-by-step explanation:

Hope this helps even tho it is like 2 years later

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===========================================================

Explanation:

Think of a hexagonal room with n = 6 walls, i.e. the floor is a hexagon with n = 6 sides. The floor and ceiling are parallel to each other, and congruent hexagons. That's 2 faces so far. Then we have another 6 faces to account for the walls. This gives 2+6 = 8 faces of a hexagonal prism.

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------------------------

Let's go back to the hexagonal prism. The floor has 6 sides to it, and so does the ceiling. We have 6+6 = 12 edges so far. Then we have another 6 edges where each of the rectangular walls meet up. That gives 12+6 = 18 edges total of this hexagonal prism room.

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--------------------------

Once again lets revisit the room with the hexagonal floor and ceiling. The floor has 6 vertices and the ceiling has the same vertex count. Therefore, this prism has 6+6 = 12 vertices.

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---------------------------

One way to check the answer:

We could use Euler's Polyhedron Formula which is

F+V-E = 2

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This confirms the formula works for a hexagonal prism.

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We found earlier that,

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So,

F+V-E = 2

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This helps confirm the answer for any prism with the base of n sides.

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