A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The trip back took 42 hours. What is the speed of the boat in still water? What is the speed of the current?

How do you solve 3n + 8 = 29

3 (2^9x-8) - 7=14 solve for x

Suppose that the correlation between midterm 1 and midterm 2 is 0.55; the mean and standard deviation of midterm 1 are 71 and 3, while for midterm 2 the mean and standard deviation are 81 and 4. There are 21 students in the class. Test, at level 0.

How many minutes does it take9 people to paint 7 walls?

How do you write 228 o/o as a fraction

What does a computer do when it's hungry

Brandie is trying to decide between two cell phones. One is free with a 2-year contract, but she will have to pay the sales tax of 8% on the original price$399 and the monthly charge is $10 more than she currently pays.

If the length of side a is 16 centimeters, the length of side b is 10 centimeters, and m = 42°, what is the measure of? Round your answer to two decimal places.

Solve for y. 18y - 6 = - 30

Multiply. (3x + 2) (3x - 2) A. x² + 12x - 4 B. 9x² - 12x - 4 c. 9x - 4 D. 9x² + 4