Which of the following would be a good estimate for -7.94 - 2.31?

-10
-5
-9
-6

-10.

Step-by-step explanation:

-7.94 can be estimated as -7.9, and -2.31 as -2.3.

Hence, the end result is -7.9 - 2.3 = -10.2.

Therefore, -10 is a good estimate.

Hope this helped!

answer: sorry i can't you.

step-by-step explanation:

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°