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Svet_ta [14]
3 years ago
6

What is the length of x? What is the length of EF? Only enter numbers in the answer boxes below:

Mathematics
1 answer:
dimaraw [331]3 years ago
7 0

Focus on triangles DFC and DFE:

  • They are both right triangles because DF is perpendicular to EC
  • DC=DE
  • DF is a common side

So, the two triangles are congruent. It follows that CF=FE, and in particular

8x=3x+15 \iff 5x=15 \iff x=3

And since x=3, the length of EF is

EF=3x+15=3\cdot 3+15=24

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horrorfan [7]

Answer:

<em>Cost</em>=x25+200

Step-by-step explanation:

The amount of people is unknown but each person the cost will be $25 for refreshments per each passenger; the limo cost $200 once you figure out how many people will go to prom x will be, EXAMPLE: x=6 times $25 plus $200 which will give you the cost.

5 0
3 years ago
a local restaurant offers a deal if you purchase 3 medium pizza, you get 2 sides dishes for free. if you get a total of 8 side d
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In need of help! find the value of x
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∆= 180°
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3 0
3 years ago
A ladder is leaning against
Svetradugi [14.3K]

Answer:

25 ft

Step-by-step explanation:

This is a right triangle, so we can use the Pythagorean theorem

a^2+b^2 = c^2  where a and b are the legs and c is the hypotenuse

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2 years ago
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padilas [110]

Answer:

Average\ Speed = 60 mi/hr

Step-by-step explanation:

Given

Distance = 345\ miles

Time = 5\ hours\ 45\ minutes

Required

Determine the average speed

This is calculated as thus:

Average\ Speed = \frac{Distance}{Time}

Convert time to hour:

Time = 5\ hours\ 45\ minutes

Time = 5\ hours + \frac{45}{60}\ hour

Time = 5\ hours + \frac{3}{4}\ hour

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Time = \frac{23}{4}\ hours

Time = 5.75\ hours

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Average\ Speed = \frac{345}{5.75}

Average\ Speed = 60 mi/hr

7 0
3 years ago
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