Sarah needs 20 g of 80% gold to make a pendant. She has some 85% gold and some 70% gold. from broken jewellery and wants to know how much of each she should use. Determine the
quantity of each alloy that she should use.

Write an algebraic expression to match each statement a. four less than 8 times a number b. twice the difference of a number and six c. nine from a number squared

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons