45x^4 + 72x^3 is factored form

Cate purchases $1600 worth of stock and her broker estimates it will increase in value by 4.2% each year. after about how many years will the value of cate's stock be about $2000

Solve 2x − 1 = 11 for x using the change of base formula log base b of y equals log y over log b.

Use matrices to solve this linear system: 5x1 − 2x2 = −30 2x1 − x2 = −13 x1 = x2 =