Answer:
prolly 23
Step-by-step explanation:
Volume : 420/2=210
Volume Formula : Base x height x width
for a triangle 1/2 x 6 x 7 x10 =210
3
-2x-24
-5x+3x-24 = - 2x-24
789
.5 is a 5 or larger so the 8 goes to a 9
