Question

Saying that 4 < x < 9 is equivalent to saying what about x ?
A. 0 < x < 5
B. 0 < x < 65
C. 2 < x < 3
D. 4 < x < 9
E. 16 < x < 81

so i haven't been to school in years and forgot every thing. whats going on here. 4 is greater than (the square root of x??) which which is greater than 9?

Answer 1

its the same thing as saying x is greater than 4 but less than 9

Answer 2

Is this supposed to be 4 < x^2 < 9? You only have 4 < x < 9 in the question.

Answer 3

oh... not evey thing copies...

Answer 4

\[4<\sqrt{x}<9\]

Answer 5

so square everything to get rid of the square root

Answer 6

the answer would be E

Answer 7

thankyou

Answer 8

Oh, ok.
4 < sqrt(x) < 9
Square all three part:
4^2 < (sqrt(x))^2 < 9^2
16 < x < 81

Answer 9

yep