Step-by-step explanation:
Mass (m) = 11 g
volume (v) = 13 ml
density (d) = ?
We know density is defined as mass per unit volume so
d = m / v
= 11 / 13
= 0.85 g/ml
Density (d) = 0.85 g/ml
Answer: B(3)
Explanation: 12+9=21 so since 4+3 only equals 7, you plug in x as 3... since 7x3 is 21 that helps make the statement true bc both equations are equal.
#31
= - 8/-8
= 1
#32
= 28/7
= 4
#34 True
#35 True
#36 False
#37 False
#38 True
Answer:
Step-by-step explanation:
<u>Number of pupils can play either instrument:</u>
<u>Number of those can play both:</u>
Yes
(x,y)
(9,9)
17(9) - 9(9) = 72
153 - 81 = 72
(9) - 9(9) = -72
9 - 81 = -72