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Morgarella [4.7K]
3 years ago
11

Your kite is stuck in a tree that is 40 feet tall. The angle your string makes with the ground is 72°. Rather than worrying abou

t the kite, you decide to calculate how much string you have let out. Assuming the string is held tight and makes a straight line to the ground, how much string have you let out?
Mathematics
1 answer:
Debora [2.8K]3 years ago
3 0

Answer:

42 feet of string

Step-by-step explanation:

First, draw a diagram of the string, the height and the angle.

the length of the string is equal to the hypotenuse of the triangle

let length of the string=x

sin(θ)=opp/hyp

sin(72°)=40ft/x

x=40ft/sin(72°)

x=42.05848897ft≈42ft

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-21x+3y=6 <br> How do you solve for y?
andreev551 [17]
All you've got to do is some simple algebra! When you solve for a variable, you are trying to get it alone on one side of the equation. So, we want something that looks like y = ...

First, add 21x to both sides of the equation. This will cancel out the -21x on the left side.
-21x + 3y = 6
-21x + 3y + 21x = 6 + 21x
3y = 21x + 6

Now, to get y alone, divide both sides of the equation by 3. This will cancel out the coefficient of 3 on the left side.
3y = 21x + 6
(3y)/3 = (21x + 6)/3
y = 7x + 2

There's the answer. Hope that helps! :)
3 0
3 years ago
Which of the following shows the correct solution steps and solution to
Andreyy89

C.

3x + 2 = 17 \\ 3x + 2 - 2 = 17 - 2 \\  \:  \:  \:  \:  \:  \:  \:  \:  \: 3x = 15 \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  x =  \frac{15}{3}  \\  \:  \:  \:  \:  \:  \:  \:  \: x = 5

6 0
3 years ago
What is the answer for this?
ra1l [238]

Answer:

Proved

Step-by-step explanation:

Given

(2 * 10^2) * (3 * 10^5) = 3.5 * 10^7 + 2.5 * 10^7

Required

Prove

On the right hand side, we have:

2 * 10^2 * 3 * 10^5 = 3.5 * 10^7 + 2.5 * 10^7

Rewrite:

2 * 3* 10^2  * 10^5 = 3.5 * 10^7 + 2.5 * 10^7

6* 10^2  * 10^5 = 3.5 * 10^7 + 2.5 * 10^7

Apply law of indices

6* 10^{2+5} = 3.5 * 10^7 + 2.5 * 10^7

6* 10^7 = 3.5 * 10^7 + 2.5 * 10^7

Express 6 as 3.5 + 2.5

(3.5 + 2.5)* 10^7 = 3.5 * 10^7 + 2.5 * 10^7

Open bracket

3.5 *10^7+ 2.5*10^7 = 3.5 * 10^7 + 2.5 * 10^7

Proved

3 0
3 years ago
Pleaseee help meee struggling currently
lisabon 2012 [21]

Answer: 2908.92435 inches.

Step-by-step explanation for shape 1: A = 2(wl + hl + hw) = 2 · (30 · 13 + 13 · 13 + 13 · 30) = 1,898 inches.

Step-by-step explanation for shape 2:

Using the formulas:

A=2AB+(a+b+c)h

AB=s(s﹣a)(s﹣b)(s﹣c)

s=a+b+c

2

Solving for A:

A=ah+bh+ch+1

2﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=9·30+13·30+9·30+1

2·﹣94+2·(9·13)2+2·(9·9)2﹣134+2·(13·9)2﹣94≈1010.92435

Step-by-step explanation for total volume: 2908.92435 inches.

5 0
3 years ago
Read 2 more answers
Find the average value of the function over the given solid. The average value of a continuous function f(x, y, z) over a solid
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Compute the volume of Q:

\displaystyle\iiint_Q\mathrm dV=\int_0^2\int_0^{2-x}\int_0^{2-x-y}\mathrm dz\,\mathrm dy\,\mathrm dx=\frac43

Integrate f(x,y,z)=x+y+z over Q:

\displaystyle\iiint_Qf(x,y,z)\,\mathrm dV=\int_0^2\int_0^{2-x}\int_0^{2-x-y}(x+y+z)\,\mathrm dz\,\mathrm dy\,\mathrm dx=2

So the average value of f over Q is 2/(4/3) = 3/2.

4 0
4 years ago
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