The distance from the outside edge of a circle to its centre is given by its radius. The circumference of a circle is given by 2πr, thus if we know that this is equal to 75 feet and using π = 3.14, we get:

75 = 2*3.14*r
r = 11.942
Thus r = 12 ft (to the nearest foot)

6 0

3 years ago

What is the value of each expression in the simplest form? -11/15 + (-2/15)

Liula [17]

Answer:

$\frac{ - 13}{15}$

Step-by-step explanation:

$\frac{ - 11}{15} + \frac{ - 2}{15} = \frac{( - 11 - 2)}{15} = \frac{ - 13}{15}$

6 0

2 years ago

Find all the zeros of x^3-5x^2-x+5

AnnyKZ [126]

The fact that the coefficients are pairwise identical (except for sign) tells you that x^2 -1 is a factor (and x-5 is the other factor). Of course, you recognize x^2-1 as a special form (the difference of squares) that is factored as (x +1)(x -1).

The zeros are x = -1, +1, +5.

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A graphing calculator confirms this.

3 0

2 years ago