Aregular pentagon has radii of 10 inches. what is its area of the pentagon, rounded to the nearest whole square inch?

Step-by-step explanation:

we know that

The radii divide the pentagon into five isosceles triangles each with a center angle of 360/5 = 72 degrees

so

The area of the regular pentagon is equal to the area of one isosceles triangle multiplied by 5

step 1

Find the area of one isosceles triangle

Applying the law of sines

step 2

Find the area of the regular pentagon

Round to the nearest whole square inch

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.

27 + 13x + 15 = (x + 5)( =

step-by-step explanation:

27 + 13x + 15 = (x + 5)( = 27 + 13x + 15 = (x + 5)( = 27 + 13x + 15 = (x + 5)( =