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Citrus2011 [14]
3 years ago
6

MATH I GAVE ALL MY POINTS FOR THIS

Mathematics
2 answers:
kondaur [170]3 years ago
8 0

Answer:

A = 72 cm^2

B = 364 in^2

C = 121 yd^2

D = 504'^2

explanation step by step

a) area of a triangle = (b x h) / 2 = 16 X 9 /2 = 72 cm^2

A = 72 cm^2

b) area of a parallelogram = (b x h) = 26 X 14 = 364 in^2

B = 364 in^2

c) area of  a square =  (b x h) = 11 X 11 = 121 yd^2

C = 121 yd^2

d) are of a trapezoid  = (b1 + b2 /2 all times height

(6 + 21) / 2 x 8

126 / 2 x 8

63 x 8 = 504'^2

D = 504'^2

DIA [1.3K]3 years ago
7 0

a) area of a triangle = (base X height) / 2 = 16X9/2 = 72cm squared

b) area of a parallelogram = (base X height) = 26 X 14 = 364 in squared

c) area of  a square =  (base X width) = 11 X 11 - 121 yds sqaured

d) are of a trapezoid (the hardest) =

(top bases + bottom base) /2 all times height

(6   +   21) /2  times 8

126/2 times 8

63 times 8 = 504 ' squared

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The sum of two rational numbers is 4/7.If one of them is 3/14 find another numbers.​
VMariaS [17]

Answer:

5/14

Step-by-step explanation:

let the aaded no be x

3/14 + x = 4/7

x = 4/7-(3/14)

x = 5/14

here added no is 5/14

4 0
4 years ago
In a recent international sport​ competition, the top three countrieslong dash—country ​a, country​ b, and country clong dash—wo
Alex73 [517]
We need to build a system of equations:

a + b + c = 127......(1)
b  - c = 13..............(2)
a - b - c = 41..........(3)

adding equations (1) and (3):-

2a = 168
a = 84   
Substituting for in equation (1)-
84 + b + c = 127
b   + c = 43...........(4)
Adding equations (2) and (4):-
2b = 56 

b = 28
Finally from equation (2)
c = 28-13 = 15

Answer is Country a had 84 points , b had 28 points and c had 15 points.

4 0
3 years ago
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Step-by-step explanation:

7 0
3 years ago
For what side length(s) is the area of an equilateral triangle equal to 30 cm?? Only enter the number, in centimeters, rounded t
xenn [34]

Answer: The sides length are 8.32 cm

Step-by-step explanation:

An equilateral triangle has all his sides of the same lenght, so we assume that the triangle has an L lenght in his sides.

The area of a triangle is Area = \frac{base * height}{2} where the base is L, the Area is 30 and an unknown height.

To determine the height, we cut the triangle in half and take one side. By simetry, one side has a base of \frac{L}{2}, a hypotenuse of L and a the unknown height.  

Then we apply the <em>Pythagoras theorem</em>, this states that <em>in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides</em>, or, hypotenuse = \sqrt{c^{2} + c^{2} } Where one c is \frac{L}{2} and the other is the height.

Then we find one of the c of the equation wich will be the height.

height = \sqrt{hypotenuse^{2}-base^{2} }

height = \sqrt{ L^{2} -\frac{L}{4} ^{2}}\\height = \sqrt{\frac{ 3L^{2}}{4} } \\\\height = \frac{\sqrt{3}L }{2}

Finally, we use the triangle area mentioned before an find the value of L.

30 = \frac{L*\frac{\sqrt{3}L }{2} }{2} \\\\L = \sqrt{\frac{120}{\sqrt{3} } } \\\\L = 8.32 cm

6 0
3 years ago
Please help! And please show work.
Iteru [2.4K]
This answer would be D because an equilateral triangles angles are all the same
7 0
3 years ago
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