Book Maths Puzzle Algebra

Red Beads cost $1.30 per box, they are mixed with yellow beads that cost $2.00 a box. How many boxes of each color must be used to make 10 boxes of beads costing $1.72 per box?

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Book Other Question

find the vertex of the parabola: y=4x^2-8x+5 Solve: (z-8)(z+4)= -35