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2 years ago

(Help) Find the measure of the missing angle

Mathematics

1 answer:

melisa1 [442]2 years ago

8 0

Solution:

Let the missing angle be x.

It should be noted:

The two diagonals form four isosceles triangles. (ΔBOC, ΔCOD, ΔDOA, and ΔAOB)
∠DOA = ∠BOC = 44 (Vertically opposite angles)
Interior angles of a triangle sum up to 180°

This means that...

44 + x + x = 180

Combine like terms.

44 + 2x = 180

Subtract 44 both sides.

2x = 180 - 44

Simplify the RHS

2x = 136

Divide 2 both sides.

2x/2 = 136/2
=> x = 136/2 = 68°

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Answer:

14000 liters

Step-by-step explanation:

500 * 4 = 2000

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3 years ago

Help please

ddd [48]

Answer:

B. When the peak temperature is 40°C, 72 units of electricity are used on average.

Step-by-step explanation:

We see the relationship is closer to linear in the interval 30 to 40

Approximate points:

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The slope of the line:

m = (54 - 34)/(34- 30) = 20/4 = 5

The line is:

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At x = 40, the value of y would be:

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The closet option is B

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2 years ago

Find the limit. use l'hospital's rule if appropriate. if there is a more elementary method, consider using it. lim x→4 x2 − 16 x

ivolga24 [154]

Probably you are supposed to compute

$\displaystyle\lim_{x\to4}\frac{x^2-16}{x^2-4x}$

Factorize the numerator and denominator, then simplify:

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3 years ago

the cost to operate a certain aircraft is $255 per hour the algebraic expression 255t gives the total cost to operate the aircra

Temka [501]

Answer:

Total cost for 2.80 hours = ($255/hr)(2.80 hrs) = $714.

Step-by-step explanation:

Multiply this hourly rate by the elapsed time (2.80 hours):

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3 0

2 years ago

Can someone help me please

saul85 [17]

Using the Law of Sines (sina/A=sinb/B=sincC for any triangle)

sinc/28=sin90/53 (sin90=1) multiply both sides by 28

sinc=28/53 take the inverse of sin (arcsin) of both sides

c=arcsin(28/53)°

c≈31.89° (to nearest hundredth of a degree)

So it is obvious that they rounded to nearest tenth of a degree

c≈31.9°

5 0

2 years ago

Read 2 more answers