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lapo4ka [179]
3 years ago
14

Please help. Trig: Laws of Cosines

Mathematics
1 answer:
ladessa [460]3 years ago
8 0

Answer:

16.2 units

Step-by-step explanation:

Greater angle: 180 - 72 = 108

D² = 10² + 10² - 2(10)(10)cos(108)

D² = 261.8033989

D = 16.18033989

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Norma-Jean [14]

Answer:

A. 30800

B.39600

C. 17600

Step-by-step explanation: 0.12*$35000= 4200 35000-4200 = $30800

$45000*0.12=$5400 $45000-$5400= $39600

$20000*0.12=$2400 $20000-$2400= $17600

7 0
3 years ago
Please Help I Will Mark Brainly.
Evgesh-ka [11]

Answer:

13

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Step-by-step explanation:


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3 years ago
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You need 8 oz of red paint and 12 oz of blue paint to make purple paint. How much red paint is needed for 15 oz of blue paint?
olga2289 [7]

Answer:

10oz

Step-by-step explanation:

Solve

<h2>\frac{8}{12} = \frac{x}{15}</h2><h2>x=10</h2><h2></h2>
4 0
3 years ago
Find the area of the regular trapezoid. The figure is not drawn to scale. The top side is 4, the bottom side is 7, and both side
svp [43]
A regular trapezoid is shown in the picture attached.

We know that:
DC = minor base = 4
AB = major base = 7
AD = BC = lateral sides or legs = 5

Since the two legs have the same length, the trapezoid is isosceles and we can calculate AH by the formula:

AH = (AB - DC) ÷ 2
      = (7 - 5) ÷ 2
      = 2 ÷ 2
      = 1

Now, we can apply the Pythagorean theorem in order to calculate DH:
DH = √(AD² - AH²) 
      = √(5² - 1²)
      = √(25 - 1)
      = √24
      = 2√6

Last, we have all the information needed in order to calculate the area by the formula:

A =  \frac{(AB + CD)DH}{2}

A = (7 + 5) × 2√6 ÷ 2
   = 12√6

The area of the regular trapezoid is 12√6 square units.

7 0
3 years ago
Which rules define the function whose graph is shown?   on  x &lt; −2   on  −2 ≤ x &lt; 0   on  0 ≤ x &lt; 2   on  2 ≤ x
jeyben [28]

Answer:

-4, -x^2, x^2, 4

Step-by-step explanation:

4 0
3 years ago
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