Use the expression 5x + 23 to match the following vocabulary words. a. 2 b. 3 c. 5 d. x 1.coefficient 2.base 3.exponent 4.variable

Aboat has a speed of 9 mph in calm water. it takes the boat 4 hours to travel upstream but only 2 hours to travel the same distance downstream. which equation can be used to find c, the speed of the current? 2(9 – c) = 4(9 + c) 9 + c = 4(9 – c) 9 – c = 2(9 + c) 4(9 – c) = 2(9 + c)