Aclock is shaped like a circle with the diameter of 14in. to the nearest inch, what is the circumference of a clock?

a. 88 in
b. 44 in
c. 22 in
d. 28 in

The circumference is 44in

Step-by-step explanation:

There is an equation that relates the diameter with the circumference of a circle:

Diameter(D)= (Circumference(C))/π

Where π is pi number, which is a constant number, and is equal to 3,1416

In order to know what is the circumference, you have:

D=C/π

Then:

C=D*π

C=14 in*3,1416

C=43,98

C= 44 (round number)

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

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step-by-step explanation: