Need help please its over due no links or random answers i will report. only answer if you actually know :)
question (find area of rhombus. Each indicated distance is half the length of its respective diagonal)
it uses this: A=1/2 d1 d2​

X+ y = 5 ; x - y =3 solve using linear combination

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?