MathDB
Real numbers

Source: UMD 2023 I #12

October 26, 2023
UMDalgebra

Problem Statement

Suppose for real numbers a,b,ca, b, c we know a+1b=3,a + \dfrac 1b = 3, and b+3c=13.b + \dfrac 3c = \dfrac 13. What is the value of c+27a?c + \dfrac{27}a? a. 1b. 3c. 8d. 9e. 21 \mathrm a. ~ 1\qquad \mathrm b.~3\qquad \mathrm c. ~8 \qquad \mathrm d. ~9 \qquad \mathrm e. ~21