Twenty-five points for this last question
In the inequality below, x represents the number of days Kara will be able to study before her exam.

2x + 7 ≤ 31

Which phrase MOST accurately describes that number of days?
A. exactly 12 days
B. at most 12 days
C. at least 12 days
D. less than 12 days

Step-by-step explanation:

there is two answer A and D

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.

but which class are u may know that first