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Evgesh-ka [11]
3 years ago
7

A circle has a radius of 13 cm what is the diameter of the circle? What is the circumference of the circle? What is the area of

the circle? Step-by-step answer please
Mathematics
1 answer:
SVEN [57.7K]3 years ago
4 0

Answer:

Diameter: 26cm

Circumference: 26π / 81.68cm

Area: 169π / 531cm²

Step-by-step explanation:

Diameter is radius x 2, so 13 x 2 = 26

Circumference is diameter x π, so 26 x π = 26π / 81.68cm

Area is π x r², so π x 13² = 169π / 531cm²

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At a fabric store, fabrics are sold by the yard. A dressmaker spent $36.35 on 4.25 yards of silk and cotton fabrics for a dress.
vaieri [72.5K]

Given:

The system of equations that represent the constraints for the given situation is

x+y=4.25

16.90x+4y=36.35

To find:

The solution of given system of equations.

Solution:

We have,

x+y=4.25           ...(i)

16.90x+4y=36.35           ...(ii)

Multiply equation (i) by 4.

4x+4y=17           ...(iii)

Subtracting (iii) from (ii), we get

16.90x+4y-(4x+4y)=36.35-17

16.90x+4y-4x-4y=19.35

12.90x=19.35

Divide both sides by 12.90.

x=\dfrac{19.35}{12.90}

x=1.5

Put this value in (i).

1.5+y=4.25

y=4.25-1.5

y=2.75

The solution of system of equations is x=1.5 and y=2.75. It means, the yards of silk are 1.5 and yards of cotton are 2.75.

5 0
3 years ago
What is the value of x in this triangle?
Sonja [21]
X=10, the two triangles are alike except one is double the size of the other. hope this helps
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3 years ago
Substitution Property of Equality:<br> If AB = 20, then AB + CD
otez555 [7]

Answer:

CD + 20

Step-by-step explanation:

If AB = 20, then AB + CD = 20 + CD

Answer: CD + 20

5 0
2 years ago
Pls Answer this right away! PLS
LenaWriter [7]
The results of the experiment are shown in the frequency side
a) 14
b) 3600 Best guess 300*12
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2 years ago
Please answer :'&lt;
sesenic [268]

Answer:

D. 56.3 cubic units

Step-by-step explanation:

To find the volume of a rectangular prism you use the formula <u>v=l*w*h</u> which means you multiply <u>5*3*3.75</u> to find your answer of 56.3 cubic units.

3 0
2 years ago
Read 2 more answers
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