Which expressions have the same value as 4 - 8? A 3(5) − 2 + (−5) − (−5)
B −7 + 2(5) − 3(−2) + 1
C (12 ÷ 4) − 4 − 8 − (−5)
D 4(5) − 2(10) + (−20 ÷ 4)

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap