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OPTION A.

Step-by-step explanation:

First, in order to solve this exercise, it is important to know the definition of "Cross section".

A Cross-section is defined as the shape obtained when a plane intersects a 3-dimensional figure.

A Regular square pyramid has a square as its base and its faces are four congruent Isosceles triangles.

Therefore, if a plane slices a Square pyramid through the top vertex, theb figure obtained is an Isosceles triangle (which is  a triangle that has two sides of equal length).

Then, you can conclude that the options that shows the best description of the cross-section obtained by slicing the given Square pyramid  through the top vertex, is the Option A.

x ≥ 18 is your answer

step-by-step explanation:

let "a number" = x

(2/3)x + 17 ≥ 29

isolate the variable (x). do the opposite of pemdas (parenthesis, exponent (& root), multiplication, division, addition, subtraction).

first, subtract 17 from both sides.

(2/3)x + 17 (-17) ≥ 29 (-17)

(2/3)x ≥ 29 - 17

(2/3)x ≥ 12

next, multiply 3/2 to both sides to isolate the x

(3/2)(2/3)x ≥ 12(3/2)

x ≥ 12(3/2)

simplify. multiply, then divide

x ≥ (12 * 3)/2

x ≥ (36)/2

x ≥ 18

x ≥ 18 is your answer

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