How is a net useful when finding the surface area of prisms and pyramids

Answer:

Step-by-step explanation:

hello,

let's note a the number of novelists and

b the number of poets.

we know that a = 5/3 b as "enrolls novelits and poets in a ratio of 5:3"

it comes 3a=5b which is the first equation

and we know that a + b = 24 "there are 24 people"

we we have two equations

(1) 3a - 5b = 0

(2) a + b = 24

let's multiply (2) by 3 it comes 3a + 3b = 24*3 = 72

let's do 3*(2) - (1) it comes

3a + 3b -3a + 5b = 72 - 0 = 72

so 8b = 72

so b = 9

and then we replace b in (2) it comes

a = 24-9 = 15

hope this helps

This is solved by breaking the equasion down.

2 { 5 [12 + 5 (500 - 100) + 399 ]}

2 { 5 [12 + 5 (400) + 399]}

2 { 5 [12 + 2000 + 399]}

2 { 5 [2411]}

2 {12055}

24110

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Final answer:

The formula for the circumference of a circle can be rewritten in terms of its diameter by replacing the '2r' with 'd', given that the diameter is twice the radius. This yields the new formula: C = πd.

Explanation:

The original formula for the circumference of a circle is C = 2πr, where 'C' represents the circumference, 'π' is a mathematical constant approximately equal to 3.14, and 'r' is the radius of the circle.

• To rewrite this formula in terms of the diameter, we need to know the fundamental relationship between the radius and the diameter of a circle. In every circle, the diameter 'd' is simply twice the radius: d = 2r.
• Substituting this into the original formula, we replace the '2r' in 'C = 2πr' with 'd'. This gives us the new formula: C = πd.

So, the formula for the circumference of a circle in terms of its diameter is C = πd.

Learn more about Circumference of a Circle here:

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Answer:

c = 7

Step-by-step explanation:

given 2c = c + 7 ( subtract c from both sides )

c = 7