Answer:
Option A - 4
Step-by-step explanation:
Given : Inequality [tex]30 - x^2 < 3x + 7[/tex]
To find : Choose the value of x that makes the open sentence true ?
Solution :
We substitute the value of x from options to check which is true,
A) x=4
[tex]30 - 4^2 < 3(4) + 7[/tex]
[tex]30-16 < 12+ 7[/tex]
[tex]14< 19[/tex]
It is true.
B) x=3
[tex]30 - 3^2 < 3(3) + 7[/tex]
[tex]30-9< 9+ 7[/tex]
[tex]21< 16[/tex]
It is false.
C) x=2
[tex]30 - 2^2 < 3(2) + 7[/tex]
[tex]30-4<6+ 7[/tex]
[tex]26< 13[/tex]
It is false.
D) x=1
[tex]30 - 1^2 < 3(1) + 7[/tex]
[tex]30-1<3+ 7[/tex]
[tex]29< 10[/tex]
It is false.
Therefore, Option A is correct.
