For which values of a the system has no solution: x≤5, x≥a

Given:

The system of inequalities is

To find:

The values of a for which the system has no solution.

Solution:

We have,

       ...(1)

It means the value of x is less than or equal to 5.

       ...(2)

It means the value of x is greater than or equal to a

Using (1) and (2), we get

But if a is great than 5, then there is no value of which satisfies this inequality.

Therefore, the system has no solution for a>5.

the answer would be the last one (constat) she stays at the same rat every two mintues it goes up by 0.4

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional