Use the properties of exponents to solve each question ​

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?