999 because:
1) it does not contain any zeros
2) it is the largest number possible 3-digit number
3) 999 / 9 = 111
You can "add" like you say or you could just call it subtracting. If you subtract 5 from 5 you still get zero. Then on the right side, you would do the same. You would subtract 5 from 12 getting x, which is 7.
If you added you would still get the same answers but it is easier to say just subtract. Anything you do to the left, do to the right.
Hope this helps :)
T=D/S
15K/7.6= 1973.6842sec round up=1974/60s =32.9 round up 33minutes
=33 minutes
85 to 60 will take 5 min
90 to 60 will take 6 min
Answer:
B. 18 sq in.
Step-by-step explanation:
Surface area of the triangular pyramid excluding the base = area of the three triangular faces = 3(½ × base × height)
Where,
base = 3 inches
height = ED = 4 inches
Plug in the known values into the equation
Surface area of the triangular pyramid excluding the base = 3(½ × 3 × 4)
= 3(3 × 2)
= 3(6)
= 18 sq in.