There are 27 brown cows and black cows in a field. Then some of the cows go into the barn. Now there are 38 cows in the field. How many cows went into the barn?

Which of the following is an equation of a line parallel to the equation y=4x+1?

I’ve been trying all day to figure this puzzle out. i need the work for it aswell. it is a factoring polynomials tarsia. the image is below.

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)