Kelsey bought 9.6 ounces of chocolate. 7.9 ounces of it was milk chocolate and the rest was dark chocolate. How much dark chocolate did Kelsey buy?

Step-by-step explanation:

dark chocolate = 9.6 - 7.9 = 1.7 ounces

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°

thats not a system of equations, that is a solution