Which value for a satisfies the equation 3 - 4(1 + a) = 7? a = -2 a = -6 a = 2 a = 6

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions

Find the maximum value of p= 4x + 5y subject to the following constraints :

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?