Which set of ordered pairs represents a function? 1-{(−5,−4),(3,4),(7,−6),(7,1)}

2-{(8,−2),(6,8),(6,3),(−4,−2)}

3-{(7,5),(7,−9),(−2,−3),(4,−1)}

4-{(−8,−7),(0,−7),(−4,0),(4,−5)}

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account.write an expression to represent the total amount in his savings account.