The diameter of one red blood cell is about 2.95E-4 of an inch. It would take about 5.35E12 red blood cells laid end to end to span the circumference of the earth.
What would be the length of this chain of red blood cells?

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

~

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.

how many friends does he have? i think some of the information got cut off in the problem.