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g100num [7]
3 years ago
13

What is the area of triangle DEF

Mathematics
2 answers:
Rainbow [258]3 years ago
6 0

Answer: 588 centimeters

Lunna [17]3 years ago
3 0

Answer:

C: 588 square centimeters

Step-by-step explanation:

A= 1/2(b)(h)

base: 42

height: 28

A = 1/2(42)(28)

A = 1/2(1176)

A = 588

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triangle ABC is isosceles, angle B is vertex angle , AB = 20x -2, AC =25x, and BC =12 x +20. Find x and the length of each side
lisov135 [29]

Length of AB = 18. 92

Length of AC = 26. 15

Length of BC = 32. 552

<h3>How to determine the sides of the triangle</h3>

Using the Pythagorean theorem, we have that

(20 x-2)^2 = (12x + 20)^2 + (25x)^2

Expand the bracket

400x^2- 4 = 144x^2 + 400 + 625x^2

Collect like terms

400x^2 - 144x^2 - 625x^2 = 400 + 4

-369x^2 = 404

Make x^2 subject

x^2 = \frac{404}{369}

x = \sqrt{1.0948}

x = 1. 046

Thus,

Length of AB = 20x -2 = 20(1. 046) - 2 = 18. 92

Length of AC = 25x = 25* 1.046 = 26. 15

Length of BC = 12x + 20 = 12(1. 046) + 20 = 32. 552

Learn more about isosceles triangles here:

brainly.com/question/1475130

#SPJ1

8 0
1 year ago
Please help me i’m stupid
dimaraw [331]

Answer:

6 hours

Step-by-step explanation:

if it costs 12 dollars to rent it at first then that subtracts 12 dollars from the total 30.

this leaves you with 18 buck, divide 18 by 3 and you get 6, she had it for 6hours

6 0
3 years ago
Read 2 more answers
Please hellp<br><br> Will give 100 extra point if right and brainliest
mixer [17]

Answer:

1) 500     2) $ 1000 debt    3) $350    4) $2500 debt

Step-by-step explanation:

profit = .5x -250  

1)  O      = .5x -250

250 = .5x

500 = x      number to break even

2)   f(900) =  .5 (900) -250 =  $200

       from the graph  g(200) = total debt = $1000

3)   f(x) = -75  = .5x-250    results in    x = $ 350

4)    f(500) = .5(500) - 250 = 0  

      from the graph, this corresponds to total debt g (f(500) = $2500 debt

       

7 0
1 year ago
(PLEASE HELP) Question is worth 30 points:) The following function represents the production cost F(x) In dollars for x numbers
soldi70 [24.7K]

Answer:

production cost f(x), in dollars, for x number of units produced by company 1:

f(x) = 0.05x^2 − 7x + 300

2) Table that represents the production cost g(x), in dollars, for x number of units produced by company 2:

x        g(x)

0.6     899.58

0.8     899.52

1        899.50

1.2     899.52

1.4     899.58

3) Comparison: do a table for f(x) with the same x-values of the table for g(x).

x            f(x) = 0.05x^2 − 7x + 300    g(x)

0.6         295.818                               899.58

0.8         294.432                               899.52

1            293.05                                 899.50

1.2         291.672                               899.52

1.4          290.298                              899.58

As you can see the values of f(x) are consistently lower than the values of g(x) for the same x-values.

The minimum production cost for company 2 is around 899.50 at x = 1, while the minimum production cost of company 1 is defintely lower (lower than 292.298 for sure, in fact if you find the vertex it is 55).

Answer: Based on the given information, the minimum production cost for company 2 is greater.

Step-by-step explanation:

5 0
3 years ago
Whats another way to express 52+24
Y_Kistochka [10]

Answer: (50 + 2) + 20 +4

Step-by-step explanation: you can split each number into two parts that equal that number, like 52 could be 31 +21


7 0
3 years ago
Read 2 more answers
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