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Blizzard [7]
3 years ago
5

PLEASE HELP WILL GIVE BRAINLIEST

Mathematics
1 answer:
xz_007 [3.2K]3 years ago
8 0

Answer:

6ft

Step-by-step explanation:

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A 20 ft ladder leans against a building and reaches a point 13 ft above the ground. Find, to the nearest degree, the angle that
Snezhnost [94]
Since it forms a "right triangle" we can apply trigonometry.
sin x = oppo/hyp
sin x = 13/20
x = sin^-1(13/20)
x = sin^-1(0.65)
x = 40.5
rounded to nearest degree
x = 41 degrees


Hope this helps! :)
4 0
3 years ago
What are 3 ratios that are equivalent to 18:4
MAXImum [283]
Try 9:2 and 3:1 but I'm not sure if that's right or not
7 0
3 years ago
Read 2 more answers
The manager of a store orders model railroad sets that cost $390 and sells them for $429. What is the mark-up, as a percentage?
Katarina [22]

Answer:

10%

Step-by-step explanation:

We have been given that the manager of a store orders model railroad sets that cost $390 and sells them for $429.  

We will use markup % formula for our given problem.

\text{Markup percentage}=\frac{\text{Selling price- Cost}}{\text{Cost}}\times 100

\text{Markup percentage}=\frac{429-390}{390}\times 100

\text{Markup percentage}=\frac{39}{390}\times 100

\text{Markup percentage}=\frac{1}{10}\times 100

\text{Markup percentage}=10

Therefore, markup is 10% of cost.

4 0
3 years ago
Please help. will mark brainliest. What is the value of x? Show all of your work.
AveGali [126]

Answer:

9 cm

Step-by-step explanation:

\sqrt{117} ^{2} - 6^{2}  = x^{2}

81 =x^{2}

\sqrt{81} = x

9 cm = x

6 0
3 years ago
Do you solve math in parentheses last or first​
Flura [38]

It has to be solved first.

Step-by-step explanation:

  • Parentheses has to be solved first according to the BODMAS Principle which is Brackets Open Division Multiplication Addition and Subtraction
  • If this is not followed, the answers will be different and will not get the right answer.
  • It is the same as PEDMAS which is Parenthesis Exponents Division Multiplication Addition and Subtraction
8 0
3 years ago
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