If the ratio pf white pens to green pens is 2 to 8 and there are 30 pens how many pens are white

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?

Aright triangle has an area of 21 m2. the dimensions of the triangle are increased by a scale factor of 4. what is the area of the new triangle

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is