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Diano4ka-milaya [45]

3 years ago

11

Help me, please! Do SAT prep courses really help improve your test results? Design an experiment to answer this question. Suppos

e you have 200 subjects to work with.

1 answer:

Burka [1]3 years ago

5 0

I asked 10 of my classmates and 6 out of 10 said yes.

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In JKL, mJ = 90, mK = 30, and mL = 60. Which of the following statements about JKL are true?

kumpel [21]

The <em><u>correct answers</u></em> are:

KL = 2*JL; JK = (√3)JL; and JK = ((√3)/2)KL

Explanation:

This is a 30-60-90 right triangle. This type of triangle has a special relationship among the sides. Let the smallest side, across from the 30° angle, be t. This means JL = t.

The hypotenuse of the triangle is two times the length of the smallest side; this means that KL = 2t, which means that KL = 2*JL.

The side of the triangle opposite the 60° angle will be the "medium sized" side; it is equal to √3 times the smallest side, or √3t; this gives us that JK = √3t = (√3)JL.

Comparing JK to KL, we have

$\frac{t\sqrt{3}}{2t}$

The t on top and bottom cancel out, leaving us with the ratio (√3)/2. This means that JK = ((√3)/2)KL.

8 0

3 years ago

Read 2 more answers

Factor the polynomial 8k^2 +80k +200

blondinia [14]

<h3>Solution:</h3>

$8 {k}^{2} + 80k + 200 \\ = 8( {k}^{2} + 10k + 25) \\ = 8 [{k}^{2} + 2(k)(5) + ({5})^{2} ] \\ = 8( k + 5) ^{2}$

<h3>Answer:</h3>

$8( k + 5) ^{2}$

<h3>Hope it helps..</h3>

ray4918 here to help

6 0

2 years ago

Neeeeeeeeeeed helpppppppppp

dlinn [17]

The answer is true.

Complementary = 90

Supplementary = 180

7 0

3 years ago

Read 2 more answers

An archaeologist is categorizing the artifacts he has discovered. Two-thirds of the artifacts are shards of pottery. One-eighth

Reika [66]

Answer:

Personal items=15

Step-by-step explanation:

We are given:

Total number of artifacts = 72.

We are told that 2/3 of total artifacts are shards of pottery.

$\text{Shards of pottery}=72*\frac{2}{3} =24*2=48$

We are also told that 1/8 of total artifacts are tools.

$\text{Tools}=72*\frac{1}{8}=9$

Now we will find out number of personal items by subtracting combined number of shards of pottery and tools from total number of artifacts.

$\text{ Personal items}=72-(48+9)$

$\text{ Personal items}=72-57=15$

Therefore, there are 15 personal items.

8 0

4 years ago

The diameter of a cylindrical construction pipe if 6 ft. If the pipe is 25 ft long what is it’s volume?

Alex17521 [72]

Answer:

47.77

Step-by-step explanation:

6÷3.14=1.91×25=47.77

6 0

3 years ago