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USPshnik [31]
3 years ago
14

9.

Mathematics
1 answer:
Travka [436]3 years ago
5 0

Answer: Right angled triangles and parallelograms; Pythagorean triplets, triangles meet maths; Shadows and right triangles (radius of the Earth). The right ...

Step-by-step explanation:

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Helen has 21 marbles. 2/7 of them are blue,1/3 are red and the rest are green. how many green marbles does Helen have?
andreyandreev [35.5K]

Answer:

8

Step-by-step explanation:

2/7 of 21 is 6 1/3 of 21 is 7. 6+7 is 13. 21-13 = 8

6 0
3 years ago
The width and length of a rectangular flower bed are in the ratio 5:7. The width is 40 feet. What is the length?
anzhelika [568]

Answer:

56 feet

Step-by-step explanation:

The width and length of a rectangular flower bed are in the ratio 5:7. The width is 40 feet. What is the length?

From the above question, our ratio is given as:

Width : Length

5 : 7

Width = 40 feet ,

To solve for the Length, let us represent the length as x

Width/Length

= 5/7 = 40/x

Cross Multiply

5 × x = 7 × 40

x = 7 × 40/5

x = 56 feet

Hence: The length of the rectangular flower bed = 56 feet

6 0
3 years ago
How many proportional relationships are shown in the coordinate plane here???
Sergio039 [100]

Answer:

3

Step-by-step explanation:

In the graph, there are three lines , so that indicates that there are 3 proportional relationships

4 0
3 years ago
Two identical circles of radius r are inscribed in a rectangle. . a)Find the area of the rectangle as a function of r.. b)Expres
drek231 [11]
The two circles are equally inscribe inside a rectangle which means that its length is equals to the diameter of a circle and the width is two tines the diameter of a circle. 

A. The area of the rectangle using the R. is Area = 2R*4R
B. The perimeter is express as Perimeter = 2(2R*4R)
5 0
3 years ago
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A circle has a diameter of 4 meters. What is the best approximation of its area? Use 3.14 to approximate for π . 6.28 m² 12.56 m
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 i would go with 12.56

7 0
4 years ago
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