Answer:
C
Step-by-step explanation:
Answer:
x = 28
Step-by-step explanation:
(3x + 6^o) = 90^o
3x = 84^o
x = 28
Answer:
50 J
Step-by-step explanation:
According to energy conservative law energy can not be destroyed. So as the potential energy has been decreased to 50 J, the decreased amount has become kinetic energy.
100 - 50 = 50
Many numbers, when multiplied by

, are less than

. We can find an inequality for numbers

that are sufficient.
Clearly,

is the desired inequality. We divide by 7 to find that

determines working numbers.