Abowling ball has a total diameter of 8.5 in. it consists of 2 parts. the inside is a spherical core with a diameter of 6 in. surrounding the core is a layer of polyurethane.
what is the volume of the polyurethane? use 3.14 to approximate [tex] \/pi [tex] and round your answer to one decimal place.
in3

Simplify 4 square root of 2 end root plus 7 square root of 2 end root minus 3 square root of 2 . (1 point) 2 square root of 8 8 square root of 2 8 square root of 6 6 square root of 8

Using elimination, what is -4x+2y=-12 4x+8y=-24

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?