What is one and three eights minus one and three fourths

-3/8

Step-by-step explanation:

1 3/8 minus 1 3/4, you need the denominator to be the same. so 4 goes into 8 two times and 8 goes into 8 once. so 4x2=8 what you do to the bottem you do to the top. 3x2=6. now, you have 1 3/8 minus 1 6/8 that is negitive because the bigger number is on the left. after you subtract you should get 3/8 but remember the negitive. so you should have -3/8 as your final answer

yx = 36

step-by-step explanation:

cos f = opposite side/ hypotenuse

cos f = yw / yx

we know cos f = 4/9 and yw =16

4/9 = 16/yx

multiply each side by yx

4/9 yx = 16/ yx * yx

4/9 yx = 16

multiply each side by 9/4

9/4 * 4/9 yx = 16 *9/4

yx = 36