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3 years ago

I really need help with these questions

Mathematics

1 answer:

Inessa05 [86]3 years ago

8 0

No because she bought 96 inches of lumber but she needs 100 inches!

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mariela is standing in a building and looking out a window at a tree. The tree is 20 feet away from Mariela, Mariela's line of s

PtichkaEL [24]

Answer: 30.01 feet.

Step-by-step explanation:

You need to remember this identity:

$tan\alpha=\frac{opposite}{adjacent}$

Observe the figure attached, where $h_t$ is the height in feet of the tree.

You need to calculate $h_1$ of the Triangle 1, where:

$\alpha= \alpha_1=42\°\\opposite=h_1\\adjacent=20$

Substitute values into $tan\alpha=\frac{opposite}{adjacent}$ and solve for $h_1$ :

$tan(42\°)=\frac{h_1}{20}\\\\h_1=20*tan(42\°)\\h_1=18$

Now you need to calculate $h_2$ of the Triangle 2, where:

$\alpha= \alpha_2=31\°\\opposite=h_2\\adjacent=20$

Substitute values into $tan\alpha=\frac{opposite}{adjacent}$ and solve for $h_2$ :

$tan(31\°)=\frac{h_2}{20}\\\\h_2=20*tan(31\°)\\h_2=12.01$

Then the height in feet of the tree is:

$h_t=h_1+h_2\\h_t=(18+12.01)ft\\h_t=30.01ft$

5 0

3 years ago

Helppp pleaseeeeeeeennsnsnz

const2013 [10]

Help you with what because I don't see anything?

6 0

4 years ago

What is the value of x in the equation 25-0 25x=-3? 0 -22 0 -11 o 11 o 22

natka813 [3]

Answer:

x=11

Step-by-stepx+11 explanation:

8 0

3 years ago

Read 2 more answers

If a percent is 20% in the part is $180 how do I find the original price

Lunna [17]

20% = $180
100% = x
20x = 180 × 100
20x = 18,000
x = 900

The original price is $900

6 0

3 years ago

Find the surface area of a rectangular box with length 4 ft, width 3 ft, and height 3<br> ft.

Vesna [10]

Step-by-step explanation:

Do you have a picture you can add and I could help you?

5 0

3 years ago

Read 2 more answers

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I really need help with these questions