¿Cuál de las siguientes ecuaciones NO es circunferencia y por qué? a) 3^2+3^2−2=0

b) ^2+2+5−2=2

c) 4^2+5^2+6−11+7=0

d) √2^2−5+8+1=−√2^2

(Con explicación y su circunferencia por favor)

Can some one me with these questions

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π

The measures of two supplementary angles are (2x + 10)° and (8x + 10)°. what is the measure of the larger angle? a. 16° b. 44° c. 14° d. 138°