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Neko [114]
3 years ago
13

A 21-foot ladder is leaning against a building. The base of the ladder is 7 feet from the base of the building.

Mathematics
1 answer:
vodka [1.7K]3 years ago
3 0
X - <span>the measure of the angle that the ladder makes with the ground

</span>\cos{x}= \frac{7}{21} &#10;\\&#10;\\ \cos{x}= \frac{1}{3} &#10;\\&#10;\\ x=\arccos{\frac{1}{3} } \approx 71^o<span>
</span>
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Write all your answers as a fraction.<br> 1. 8/3 - 8/5/
allsm [11]

Answer:

16/15

Step-by-step explanation:

Simplify the following:

8/3 - 8/5

Put 8/3 - 8/5 over the common denominator 15. 8/3 - 8/5 = (5×8)/15 + (3 (-8))/15:

(5×8)/15 + (3 (-8))/15

5×8 = 40:

40/15 + (3 (-8))/15

3 (-8) = -24:

40/15 + (-24)/15

40/15 - 24/15 = (40 - 24)/15:

(40 - 24)/15

| 3 | 10

| 4 | 0

- | 2 | 4

| 1 | 6:

Answer: 16/15

5 0
3 years ago
What is the equivalent faction to 2/5
AysviL [449]
There are multiple answers, here are some.

4/10
8/15

and so on and so forth, to find these, just multiply each by two, three, and so on and so forth to find more.

Hope this helps!
8 0
3 years ago
Read 2 more answers
taniqua took a test that had 20 multiple choice questions and 10 true/ false question. she got 9/10 of the multiple choice corre
Bess [88]

Answer:

18 multiple choice and 8 true/false


4 0
4 years ago
Which number is the largest 1.2 x 10^4, 4.5 x 10^-3,3.8x10^3,7.5^3
astra-53 [7]

1.2x10^4

Step-by-step explanation:

2.

negative exponent means it's a fraction so

4.5x10^-3 is 1/4500 or 0.0045 so

it's a very small number

1.

^4 means means move the decimal 4 spots

12×10^4 = 12,000

3.

^3 means move the decimal 3 spots

3.8 x 10^3 =

3800

4.

7.5x10^3 =

7500

3 0
2 years ago
Find the value of x in the triangle shown below.<br> 8<br> 2<br> Answer?
Lyrx [107]
The answer is -2 because I already took this
6 0
3 years ago
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