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asambeis [7]
3 years ago
12

Geometry help please!

Mathematics
1 answer:
Mariulka [41]3 years ago
6 0

Answer:

1.20

2.6

3.Angle A is 20

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*What is the perimeter of a square with side length 13.4 inches? Write the direct variation equation.
Zarrin [17]

Answer:

53.6 inches

p = 4s

Step-by-step explanation:

The perimeter of a square is four times the side

The direct variation equation is

p = 4s

p = 4 * 13.4

p = 53.6 inches

5 0
3 years ago
Do all digits in number 333 have the same value
postnew [5]
No. the first 3 is 300, the second 3 is 30, and the third 3 is 3
6 0
2 years ago
Read 2 more answers
Help I will be marking brainliest!!!
Keith_Richards [23]
<h3>Answer:  A.  18*sqrt(3)</h3>

=============================================

Explanation:

We'll need the tangent rule

tan(angle) = opposite/adjacent

tan(R) = TH/HR

tan(30) = TH/54

sqrt(3)/3 = TH/54 ... use the unit circle

54*sqrt(3)/3 = TH .... multiply both sides by 54

(54/3)*sqrt(3) = TH

18*sqrt(3) = TH

TH = 18*sqrt(3) which points to <u>choice A</u> as the final answer

----------------------

An alternative method:

Triangle THR is a 30-60-90 triangle.

Let x be the measure of side TH. This side is opposite the smallest angle R = 30, so we consider this the short leg.

The hypotenuse is twice as long as x, so TR = 2x. This only applies to 30-60-90 triangles.

Now use the pythagorean theorem

a^2 + b^2 = c^2

(TH)^2 + (HR)^2 = (TR)^2

(x)^2 + (54)^2 = (2x)^2

x^2 + 2916 = 4x^2

2916 = 4x^2 - x^2

3x^2 = 2916

x^2 = 2916/3

x^2 = 972

x = sqrt(972)

x = sqrt(324*3)

x = sqrt(324)*sqrt(3)

x = 18*sqrt(3) which is the length of TH.

A slightly similar idea is to use the fact that if y is the long leg and x is the short leg, then y = x*sqrt(3). Plug in y = 54 and isolate x and you should get x = 18*sqrt(3). Again, this trick only works for 30-60-90 triangles.

4 0
3 years ago
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faltersainse [42]
X+y<10x+y<10 and x>4x4
8 0
3 years ago
Read 2 more answers
Solve the system by substitution: -4.5x-2y=-12.15 3.25x-y=-0.75
valina [46]

Answer:

The answer is x=0.97 while y=3.90

4 0
3 years ago
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