If a + b + c = 0 then prove that cosa/2 + cosb/2 + cosc/2 = 4 cos (pi-a/4) cos (pi-b/4) sin (pi-c/4) ​

Marina baked cookies. she gave 3/4 of the cookies to the scout bake sale. she shared the remaining 6 cookies with her friends. how many cookies did marina bake?

Which of the following will form the composite function?

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?