Need this in 3 mins, 30 points, will mark as Brainliest Solve: 21 x 39 x x 19 divided by 12 = 5187 | Pls answer the blank with a missing number

The missing number is 4

Step-by-step explanation:

Given

21 x 39 x _____ x 19 divided by 12 = 5187

Required

Fill in the gap

Let the missing number be represented with y; So, the expression becomes

Multiply both sides by 12

Rearrange the expression on the left hand side

Divide both sides by 15561

Hence, the missing number is 4

it should be a.

hope it

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