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3 years ago

How to find the missing angle of a triangle using trig when you only know 1?

1 answer:

3 0

If you have

2 KNOWN sides & 1 Angle ;
Use Cosine Rule

If you have 3 KNOWN sides,
Also Cosine Rule

If you have

2 KNOWN angles & 1 side,
Use SINE rule

If it's a right-angled triangle, use SOH CAH TOA

Hopefully this helps

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A certain forest covers an area of 2600 km2. Suppose that each year this area decreases by 7.75%. What will the area be like aft

kakasveta [241]

Answer:

After 15 years, the area will be of 775.3 km²

Step-by-step explanation:

The equation for the area of the forest after t years has the following format.

$A(t) = A(0)(1-r)^{t}$

In which A(0) is the initial area and r is the yearly decrease rate.

A certain forest covers an area of 2600 km2.

This means that $A(0) = 2600$

Suppose that each year this area decreases by 7.75%.

This means that $r = 0.0775$

$A(t) = 2600(1-0.0775)^{t}$

$A(t) = 2600(0.9225)^{t}$

What will the area be like after 15 years?

This is $A(15)$

$A(t) = 2600(0.9225)^{t}$

$A(15) = 2600(0.9225)^{15} = 775.3$

After 15 years, the area will be of 775.3 km²

3 0

3 years ago

Read 2 more answers

Find the square Root of <br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B37%7D%20" id="TexFormula1" title=" \sqrt{37} " alt="

Zolol [24]

Answer:

$\approx \frac{73}{12}\left(1 - \frac{1} {2\cdot73^2}\right)$

Step-by-step explanation:

$= \sqrt{\frac{73^2-1) 1}{12^2}} \\$

$= \sqrt{\frac{73^2}{12^2}\cdot\frac{73^2-1}{73^2}} \\$

$= \sqrt{\frac{73^2}{12^2}}\sqrt{\frac{73^2-1}{73^2}}\\$

= $\frac{73}{12}\sqrt{1 - \frac{1}{73^2}} \\$

$\approx \frac{73}{12}\left(1 - \frac{1} {2\cdot73^2}\right)$

8 0

3 years ago

What is X^2-X=0? It's factoring equations, but i'm not sure how to factor x-x=0, and then put it into curly brackets.

luda_lava [24]

Here are the solutions:
X^2 - X = 0
Factor out X
X(X - 1) = 0
Here are 2 solutions
X = 0 and X - 1 = 0, which is the same as X = 1.

The solutions are:
X = 0
X = 1.

4 0

3 years ago

A la operación cuyo resultado es un conjunto formado por la reunión de los elementos de dos o mas conjuntos se les llama

lesya [120]

Answer:

english pls i need translae

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Does the point (5, 8) satisfy the inequality 2x + y > 18?

Anarel [89]

Answer:

The answer is...... NO

Step-by-step explanation:

Step 1: Plug in your values in the x and y cordinates.

2(5) + 8 > 18

Step 2: Solve

Then you multiply 2 and 5 and get 10.

SO then your equation should look like this:

10 + 8 > 18

The answer to the question is no because in order for this to work it would need to be the greater than or equal to sign, which looks like this ≥.

Hope this helps and have a great day! :)

7 0

3 years ago