Solve x2 + 3x + 1 = 0. (1 point) a) x equals the quantity of 3 plus or minus square root 13 all over 2 b) x equals the quantity of negative 3 plus or minus square root 13 all over 2 c) x equals the quantity of negative 3 plus or minus square root 5 all over 2 d)x equals the quantity of 3 plus or minus square root 5 all over 2

c) x equals the quantity of negative 3 plus or minus square root 5 all over 2

Step-by-step explanation:

x^2 + 3x + 1 =0

using the quadratic formula

-b ± sqrt(b^2 -4ac)

 2a

-3 ± sqrt(3^2-4(1)(1))

2(1)

-3 ±sqrt(9-4)

2

-3±sqrt(5)

2

  the correct choice is marked

step-by-step explanation:

the first two graphs show multiple turning points. the last graphs matches the description in every detail.

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°