30 subtracted from four times a number is greater than the opposite of ten

The number is greater than 5.

Step-by-step explanation:

Equation: 4x - 30 > -10

Add: 4x > 20

Divide: x > 5

2.   2 3/5.

3.   2 1/2.

step-by-step explanation:

6 - 3 2/5

= 6 -   17/5

= 30/5 - 17/5

= 13/5

= 2 3/5 (answer).

5 1/4 - 2 3/4

= 21/4 - 11/4

= 10/4

= 2 1/2 (answer).

10.416 m/s

step-by-step explantion:

distance=100m

time= 9.6s

average speed=100/9.6

=10.416 m/s