All categories

3 years ago

Write an expression to determine (represent) the ratio of the circle's circumference to its radius.

Mathematics

1 answer:

Agata [3.3K]3 years ago

4 0

Answer:

$\frac{C}{r}$ = 2π

Step-by-step explanation:

The circumference (C) of a circle is calculated as

C = 2πr ( r is the radius )

Divide both sides by r

$\frac{C}{r}$ = 2π ← ratio of circumference to radius

You might be interested in

47% of 8.4 million .....

FrozenT [24]

Answer:

39,48,000

Explanation:

please mark me brainliest

7 0

3 years ago

The number of books donated to a library is increasing by 25% each month. Initially, there were 80 books donated to the library.

mamaluj [8]

Answer: 745

Step-by-step explanation: if there were initialy 80 books and its increasing by 25% every month, for month 1 we have:

25% = 0,25

increase is 1+0.25

M1 = 80.(1+0.25)¹ = 80.1.25 = 100

M10 = 80 (1+0.25)¹⁰ = 80. 9.313225 = 745.05 (end of the month)

6 0

3 years ago

Determine which expression has the greater value: 40-16 +10 or -20 + 18 + 30?

Paul [167]

Answer:

40-16+10

Step-by-step explanation:

40-16+10= 34

-20+18+18= 28

the greater answer is 40-16+10

8 0

4 years ago

Help asap pls i’ll appreciate it a lot !!

WARRIOR [948]

Answer:

A. 7.5 cm

Step-by-step explanation:

3/4 = (x + 3)/(2x + 1)

3(2x + 1) = 4(x + 3)

6x + 3 = 4x + 12

2x = 9

x = 4.5

BC = x + 3

= 4.5 + 3

= 7.5 cm

6 0

4 years ago

What is the quotient 4-x/x^2+5x-6 divided by x^2-11x+28/x^2+7x+6 in simplified form?

sashaice [31]

$\dfrac{4-x}{x^2+5x-6}:\dfrac{x^2-11x+28}{x^2+7x+6}=(*)$

$4-x=-(x-4)\\\\x^2+5x-6=x^2+6x-x-6=x(x+6)-1(x+6)=(x+6)(x-1)\\\\x^2-11x+28=x^2-7x-4x+28=x(x-7)-4(x-7)\\=(x-7)(x-4)\\\\x^2+7x+6=x^2+6x+x+6=x(x+6)+1(x+6)=(x+6)(x+1)\\\\(*)=\dfrac{-(x-4)}{(x+6)(x-1)}:\dfrac{(x-7)(x-4)}{(x+6)(x+1)}$
$=\dfrac{-(x-4)}{(x+6)(x-1)}\cdot\dfrac{(x+6)(x+1)}{(x-7)(x-4)}=\dfrac{-1}{x-1}\cdot\dfrac{x+1}{x-7}\\\\=-\dfrac{x+1}{x^2-7x-x+7}=-\dfrac{x+1}{x^2-8x+7}$

7 0

3 years ago