Which expression, when evaluated, has a result that is a natural number?
√5 · 4
√9 - 5
√4 + ()2
√256 · 0.125

option (C) and option (D)

√4 + 2

√256 · 0.125

Step-by-step explanation:

Natural numbers are positive integers

1)

√5 · 4

4√5

as √5 is not a perfect square

2)

√9 - 5

3 - 5

-2

3)

√4 + 2

2 + 2

4

4)

√256 · 0.125

16 (0.125)

16(125) {3 decimal places to left}

2000.0

2.0

2

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)