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alexgriva [62]
3 years ago
14

HELP PLEASE!!

Mathematics
1 answer:
seropon [69]3 years ago
3 0

Answer:

BD = <u>1</u> unit

AD = <u>1</u> unit

AB = <u>1.6</u> units

AC = <u>1.6</u> units

Step-by-step explanation:

In the picture attached, the triangle ABC is shown.

Given that triangle ABC is isosceles, then ∠B = ∠C

∠A + ∠B + ∠C = 180°

36° + 2∠B = 180°

∠B = (180° - 36°)/2

∠B = ∠C  = 72°

From Law of Sines:

sin(∠A)/BC = sin(∠B)/AC = sin(∠C)/AB

(Remember that BC is 1 unit long)

AB = AC = sin(72°)/sin(36°) = 1.6

In triangle ABD, ∠B = 72°/2 = 36°, then:

∠A + ∠B + ∠D = 180°

36° + 36° + ∠D = 180°

∠D =  180° - 36° - 36° = 108°

From Law of Sines:

sin(∠A)/BD = sin(∠B)/AD = sin(∠D)/AB

(now ∠A = ∠B)

BD = AD = sin(∠A)*AB/sin(∠D)

BD = AD = sin(36°)*1.6/sin(108°) = 1

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Lunna [17]

Answer:hbygyhbhbhb

scamed for points

Step-by-step explanation:

5 0
3 years ago
Given: WY=ZX<br><br> A is the midpoint of WY.<br><br> A is the midpoint of ZX.<br><br> Prove: WA =ZA
navik [9.2K]

Answer:

Given information: WY=ZX, A is the midpoint of WY and A is the midpoint of ZX.

To prove :  WA =ZA

Proof:

A is the midpoint of WY, it means A divides WY in two equal parts.

WA=AY

So, WY is twice of WA.

WY=2WA            .... (1)

A is the midpoint of ZX, it means A divides ZX in two equal parts.

ZA=AX

So, ZX is twice of ZA.

ZX=2ZA         ... (2)

WY=ZX                        (Given)

Substitute the values from equation (1) and (2).

2WA=2ZA

Divide both sides by 2.

WA=ZA

Hence proved.

5 0
3 years ago
What is the diameter of the cylinder if the height is 13, and the volume is 1256? Use 3.14 for pi.
Sergio039 [100]
Volume of a cylinder = πr²h

1256 = (3.14) x (r)² x (13)

1256 = 40.82r²

r² = 1256 ÷ 40.82

r² = 30.769

r = √30.69

r = 5.547

Diameter = Radius x 2

Diameter = 5.547 x 2 

Diameter = 11.09 units (nearest hundredth)
8 0
3 years ago
Use the function rule y=5x+1. What is y when x=3
Dmitry_Shevchenko [17]

Answer:

y = 16

(3, 16)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Step-by-step explanation:

<u>Step 1: Define</u>

y = 5x + 1

x = 3

<u>Step 2: Evaluate</u>

  1. Substitute in <em>x</em>:                    y = 5(3) + 1
  2. Multiply:                               y = 15 + 1
  3. Add:                                     y = 16
7 0
3 years ago
Read 2 more answers
FIND THE INDICATED PROBABILITY FOR THE FOLLOWING:
luda_lava [24]

The value of the probability P(A) is 0.40

<h3>How to determine the probability?</h3>

The given parameters about the probability are

P(A or B) = 0.6

P(B) = 0.3

P(A and B) = 0.1

To calculate the probability P(A), we use the following formula

P(A and B) = P(A) + P(B) - P(A or B)

Substitute the known values in the above equation

0.1 = 0.3 + P(A) - 0.6

Collect the like terms

P(A)= 0.1 - 0.3 + 0.6

Evaluate the expression

P(A)= 0.4

Hence, the value of the probability P(A) is 0.40

Read more about probability at

brainly.com/question/25870256

#SPJ1

3 0
2 years ago
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