Circumference of circle =

For all real numbers a and b, 2a • b = a2 + b2. True or False? Explain.

If the amount of corn in the field increases by 40%, what percent of the original amount do you have? If the amount of the corn in the field decreases by 40%, what percent of the original amount do you have? Explain how you know.

What is the value of x if e 3x+6=8?

Suppose the probability that your mail is delivered before 2 pm is. 90. what is the probability that your mail will be delivered before 2 pm for two consecutive days

Tammi is planning to buy a video game system for $310. Each month she doubles the amount she saved the previous month. If she saves $10 the first month, in how many months will Tammi have enough money to buy the video game system?

If line a is parallel to line c, and line c is parallel to line f, and lines c and f are different lines, which of the following statements is true? A. Line a is perpendicular to line f. B. Line a intersects line f. C. Line a is parallel to line f.

The tens digit of a two digit number excedds the unit digit by 5. if they are reversed b the new number is less by 45. if the v sum of their digits is 9 find the numbers

There are 10 players on a softball team how many ways can the first three batters be chosen

What value of t makes the following equation true? 3 (t-2) = -1

Nine is a factor of a number which statement must be true