Plz I need help on #12

Mathematics

2 answers:

Lorico [155]2 years ago

7 0

Answer:

C its C

Step-by-step explanation:

svetoff [14.1K]2 years ago

5 0

Answer:

The answer is the fourth one

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A tree casts a shadow that is 18 feet, in length. If the angle of elevation is 28, which of the following best represents the he

Liono4ka [1.6K]

The first step for this problem should always be to draw out the triangle so that you can right down the angles and side lengths. Afterward, you can use SOHCAHTOA to find the height of the tree. You would use tangent. The equation you would use is tan(28°)x/18. After solving for x, you will find the answer which is approximately 9.57 feet.

Hope this helped :)

4 0

2 years ago

3(8k – 3) = -6(7 -- 4k)

elixir [45]

I think you want me to solve for k

expanding, you get

24k-9=-42+24k

which is clearly no solution

4 0

1 year ago

Read 2 more answers

Given that (x+y+z)(xy+xz+yz)=18 and that x^2(y+z)+y^2(x+z)+z^2(x+y)=6 for real numbers x, y, and z, what is the value of xyz?

worty [1.4K]

Answer:

Step-by-step explanation:

$(x+y+z)(xy+xz+yz)=18$ Equation 1

$x^2(y+z)+y^2(x+z)+z^2(x+y)=6$ Equation 2

What is the value of $xyz$ where each variable represents a real number?

Let's expand equation 1:

$(x+y+z)(xy+xz+yz)=18$

$x(xy)+x(xz)+x(yz)+y(xy)+y(xz)+y(yz)+z(xy)+z(xz)+z(yz)=18$

Simplify each term if can:

$x^2y+x^2z+xyz+y^2x+xyz+y^2z+xyz+z^2x+z^2y=18$

See if we can factor a little to get some of the left hand side of equation 2:

The first two terms have $x^2$ and if I factored $x^2$ from first two terms I would have $x^2(y+z)$ which is the first term of left hand side of equation 2.