Which of the following is not a property of mathematical proofs?

In 2002, the price of mailing a letter was $.34 for the first ounce or part of an ounce and $.21 for each ounce or part of an ounce after the first ounce

All corresponding sides are proportional (same ratio) in similar figures. True or False

Levin's furniture gave a 40% discount off a $800 couch and another 20% off the discounted price for those that came in before 9 am. What was the final cost?

Describe the cross section. pentagon trapezoid hexagon cube

If a man's monthly salary is5000 and he spends 4200. how much did he save

The temperature is - 7 then rose 5 degrees

What is the value of x? sin49°=cosx

Is 705.003 greater than seven hundred three and five hundreths

Sally can paint a room in 7 hours while it taks steve 9hours to finsh the same room. how ling will it take them to paint if they worked together?

A buffet offers ranch or caesar dresing. The ratio of ranck dressing used to caesar dressing used is 8 : 3. If the buffet uses 72 cases of ranch dressing, how many cases of caesar do they use?