42,708 rounded to the nearest ten thousand

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

The value, v, of kalani’s stock investments over a time period, x, can be determined using the equation v=750(0.80)^-x. what is the rate of increase or decrease associated with this account? 20% decrease 20% increase 25% decrease 25% increase

Suppose the equation ||x-a|-b|=2008 has 3 distinct real roots and a not =0. find the value of b.