1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kondaur [170]
2 years ago
11

Please help asap no wrong answers pls

Mathematics
2 answers:
stepan [7]2 years ago
7 0

Answer:

20°

Step-by-step explanation:

#thanks me late,thankyou

Eva8 [605]2 years ago
3 0

Answer:

x = 20

Step-by-step explanation:

x° + 2x° + (x + 10)° = 90° ( complementary angles)

(4x + 10) ° = 90°

4x + 10 = 90

4x = 90 - 10

4x = 80

x = 80/4

x = 20

You might be interested in
A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. A previous study indicates that the propo
never [62]

Answer:

A sample of 997 is needed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is of:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

A previous study indicates that the proportion of left-handed golfers is 8%.

This means that \pi = 0.08

98% confidence level

So \alpha = 0.02, z is the value of Z that has a p-value of 1 - \frac{0.02}{2} = 0.99, so Z = 2.327.  

How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 2%?

This is n for which M = 0.02. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 2.327\sqrt{\frac{0.08*0.92}{n}}

0.02\sqrt{n} = 2.327\sqrt{0.08*0.92}

\sqrt{n} = \frac{2.327\sqrt{0.08*0.92}}{0.02}

(\sqrt{n})^2 = (\frac{2.327\sqrt{0.08*0.92}}{0.02})^2

n = 996.3

Rounding up:

A sample of 997 is needed.

3 0
3 years ago
How many faces,edges and vertices does a hexagonal pyramid have?
Svetradugi [14.3K]
There are 7 faces, 12 edges and 24 vertices in a hexagonal pyramid.
6 0
3 years ago
Read 2 more answers
HELP. EASY MATH. 14POINTS
ira [324]

Do Pythagorean theorem. If you don't know what that is...

Do A squared plus B squared Equals C squared and you will get your answer for the shape. Then calculate the area

8 0
3 years ago
Read 2 more answers
Which road makes with the horizontal
andre [41]
A mountain road makes the horizontal
6 0
3 years ago
Please help me out please
solong [7]

Answer:

h = 10.92 m.

Step-by-step explanation:

The small triangle on the left is similar to the whole triangle, so:

12/20 = h/18.2

h = 12*18.2 / 20

h = 10.92 m.

8 0
3 years ago
Other questions:
  • sara wants to buy a necklace. the necklace has a list pice of $41 and the saels tax is 6%what will be the cost of the necklace a
    11·2 answers
  • Simplify the given expression.
    9·2 answers
  • Help on this please, i dont get this problem.
    11·1 answer
  • What is the solution to 4x + 6 ≤ 18?​
    13·2 answers
  • HELP ME PLS I REALLY NEEDD HELP!!!! MATH IS HORRIBLE
    12·1 answer
  • Please help! I need help on 3 and 4. Will mark Brainiest for best answer!
    11·1 answer
  • PLEASE HELP ME FAST AND EXPLAIN!!! 70 POINTS!
    10·2 answers
  • PLS HELP!! :// i rlly need it!
    15·1 answer
  • 2=<img src="https://tex.z-dn.net/?f=%5Cfrac%7Bu-12%7D%7B3%7D" id="TexFormula1" title="\frac{u-12}{3}" alt="\frac{u-12}{3}" align
    14·2 answers
  • Triangle XYZ has points X = (–4,4), Y = (0,1), and Z = (4,4). Triangle X'Y'Z' has points X ’= (–5,–4), Y’ = (–1,–1), Z’ = (3,–4)
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!