Which set of ordered pairs represents a function? {(0, 0), (2, 3), (1, -4), (2, -2)} {(5, 6), (2, 6), (-3, 4), (-1, 4)} {(3, -2), (-4, -1), (0, 3), (0, 5)} {(-5, 1), (-4, 2), (-5, 3), (-4, 4)}

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

Find two numbers if their sum is 91 and the ratio is 6: 7?

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle.what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle.what is the measure of angle a? enter your answer in the box.m∠a= 3.)quadrilateral abcd is inscribed in this circle.what is the measure of angle b? enter your answer in the box.m∠b= °4.)quadrilateral abcd is inscribed in this circle.what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle.what is the measure of angle c? enter your answer in the box.°