2 years ago

Hi, prove that (AXB).(CXD)+(BXC).(AXD)+(CXA).(BXD)=0

Mathematics

1 answer:

slava [35]2 years ago

5 0

No.i will not prove that.

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Tara standing 20 feet from a tree and the angle of elevation is 72°. About how tall is the tree?

Zinaida [17]

Answer:

Approx 61.554 feet

Step-by-step explanation:

Since we are dealing with the opposite and adjacent sides, we will use tangent as our ratio.

Since the angle of elevation is 72 degrees, the left side of our equation is $tan(72)$ .

The right side of the equation is opposite over adjacent.

$x/20$

Set these equal to each other.

$tan(72) = x/20$

Simplify.

$20 tan(72)=x$

$20(3.078) = x$

x is approximately 61.554.

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2 years ago

Solve:

riadik2000 [5.3K]

$\qquad \qquad\huge \underline{\boxed{\sf Answer}}$

Let's solve ~

$\qquad \sf \dashrightarrow \: \dfrac{2x - 1}{5} = \dfrac{x - 2}{2}$

$\qquad \sf \dashrightarrow \: 2(2x - 1) = 5(x - 2)$

$\qquad \sf \dashrightarrow \: 4x - 2 = 5x - 10$

$\qquad \sf \dashrightarrow \: 5x - 4x = -2 + 10$

$\qquad \sf \dashrightarrow \: x = 8$

Value of x is 8

8 0

1 year ago

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Luke's Motel rents rooms with 2 beds for $65 and rooms with 1 bed for $56. On a given night Luke's Motel takes in $4836, and twi

Marat540 [252]

52 double bed rooms were rented, and that means there were 26 single bed rooms rented.

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2 years ago

A coin is biased to show 35% heads and 65% tails. the coin is tissed twice. what is the probability that the coin turns up heads

bekas [8.4K]

The required probability is:
$P(1\ heads\ and\ 1\ tails)=2C1\times0.35\times0.65=0.455$
The answer is 0.455.

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3 years ago

A realtor sells 3 houses this month for a total of $825,000, and each buyer uses her company to process their loan.

andrew11 [14]

Answer:

$2,651

Step-by-step explanation:

The first step is to find what 1.5% of $2,600 is.

Secondly, divide 2600 / 100 = 26

Finally, multiply 26 by 1.5 = 39.

Add 39 and 12 to 2600 = $2,651.00 total earnings for the month.

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2 years ago

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