Solve the system of equations and choose the correct answer from the list of options.

d + e = 1
−d + e = −5

label the ordered pair as (d, e).

(0,0)
(3,-2)
(-2,3)
(-3,0)

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

Simplify. −4x^2 (5x^4−3x^2+x−2) −20x^6−12x^4+8x^3−8x^2 −20x^6+12x^4−4x^3+8x^2 −20x^8+12x^4−4x^2+8x −20x^6+12x^4+4x^3−8x^2

Plz ( true - false) all triangles have interior angles whose measure sum to 90.