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
Lisa [10]
3 years ago
10

Hello can someone please help with this question.

Mathematics
2 answers:
quester [9]3 years ago
5 0

Answer:

x = 20.

Step-by-step explanation:

This is a right triangle, so by Pythagoras:

29^2 = x^2 + 21^2

x^2 = 29^2 - 21^2

x^2 =  400

x = √400

x = 20.

nexus9112 [7]3 years ago
4 0

Answer:

20

Step-by-step explanation:

sqrt(29² - 21²)

sqrt(400)

= 20

You might be interested in
Where should the point P be chosen on line segment AB so as to maximize the angle θ? (Assume a = 4 units, b = 5 units, and c = 9
taurus [48]
From the figure, let the distance of point P from point A on line segment AB be x and let the angle opposite side a be M and the angle opposite side c be N.

Using pythagoras theorem,
\tan M= \frac{a}{b-x} \\ \\ M=\tan^{-1}\left(\frac{a}{b-x}\right)
and
\tan N= \frac{c}{x} \\ \\ N=\tan^{-1}\left(\frac{c}{x}\right)

Angle θ is given by
\theta=180-M-N \\  \\ =180-\tan^{-1}\left(\frac{a}{b-x}\right)-\tan^{-1}\left(\frac{c}{x}\right)

Given that a = 4 units, b = 5 units, and c = 9 units, thus
\theta=180-\tan^{-1}\left(\frac{4}{5-x}\right)-\tan^{-1}\left(\frac{9}{x}\right)

To maximixe angle θ, the differentiation of <span>θ with respect to x must be equal to zero.
i.e.
\frac{d\theta}{dx} = -\frac{4}{x^2-10x+41} + \frac{9}{x^2+81} =0 \\  \\ -4(x^2+81)+9(x^2-10x+41)=0 \\  \\ -4x^2-324+9x^2-90x+369=0 \\  \\ 5x^2-90x+45=0 \\  \\ x^2-18x+9=0 \\  \\ x=9\pm6 \sqrt{2}

Given that x is a point on line segment AB, this means that x is a positive number less than 5.

Thus
x=9-6 \sqrt{2}=0.5147

Therefore, The distance from A of point P, so that </span>angle θ is maximum is 0.51 to two decimal places.
6 0
4 years ago
Help plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Setler79 [48]

Answer:

diameter = 3,600 units

Step-by-step explanation:

Let \pi = 3.14

C = 2\pir

11,304 = 2(3.14)r

r = 1,800

d = 2r = 2(1,800) = 3,600

7 0
3 years ago
Which pair of angles are supplementary? ​
PolarNik [594]

Answer: H

Step-by-step explanation:

Supplementary angles just mean they add up to 180 degrees. 180 degrees means that when the two angles are put together one of each of their sides will form a straight line.

6 0
3 years ago
The perimeter of a triangle is not greater than 12 and the lengths of sides are natural numbers.
weqwewe [10]

Answer:

3 triangles

Step-by-step explanation:

Perimeter of triangle = a + b + c

Given that :

P = 12

and a, b, c are natural numbers

Let :

Side A = a

Side B = b

Side C = 12 - (a + b)

Side A + side B > side C - - - (condition 1)

a + b > 12 - (a + b)

a + b > 12 - a - b

a + a + b + b > 12

2a + 2b > 12

2(a + b) > 12

a + b > 6

Side A - side B < side C

a - b < 12 - (a + b)

a - b + a + b < 12

2a < 12

a < 6

b < 6 (arbitrary point)

Going by the Constraint above :

The only three possibilities are :

(2, 5, 5)

(3, 4, 5)

(4, 4, 4)

Total number of triangle = 3

Equilateral triangle (all 3 sides equal) = (4, 4, 4) = 1

Isosceles triangle (only 2 sides equal) = (2, 5, 5) = 1

3 0
3 years ago
While at the beach in Caracas, Venezuela, I found 5 pearls and 5 diamonds, I was able to sell each pearl for $15 and each diamon
horsena [70]

Answer: 165

Step-by-step explanation:

5 X( 15+18) = 5 X 15 + 5 X 18 = 75 + 90 = 165.

Distributive law = a.(b + c) = a. b + a. c

3 0
3 years ago
Other questions:
  • 47 is the result when 12 and x are added. What is the value of x? Enter your answer in the box as a fraction in simplest form.
    12·2 answers
  • For every two boys there are 4 girls do you agree with this statement explain
    11·1 answer
  • Mr. Brown's salary is $32,000 and it increases by 3% each year. What is the explicit rule for this sequence in simplified form?
    9·1 answer
  • Zoe wrote 3/5 of her essay in 30 minutes. Assuming she wrote the paper at a constant rate the entire time, which expression can
    8·1 answer
  • The jewelry store has a ring with a retail price of $372.50. It is on sale for 60% off the retail price, what is the discount an
    12·2 answers
  • Question down below thanks
    13·1 answer
  • B) Simplify (4ab^2)^3​
    12·1 answer
  • Select 3 phrases for the expressin (24)(68)
    5·2 answers
  • why is sin(90 degrees) = 1. I know that that is the answer you get when you plug it into a calculator. I need an explanation as
    13·1 answer
  • Pls help me on this problem as soon as possible(if u don’t know pls do not answer
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!