Erin say they do not have enough molding to finish decorating because they have only has 3 wholes and 25/48 feet of molding pieces. How might have erin have added to get that fraction? And show your work and explain

The triangles are similar. what is the value of x? enter your answer in the box. x = two right triangles. the larger right triangle is labeled x on the longer leg, 12 on the shorter leg and 20 on the hypotenuse. the smaller triangle is labeled 4 on the longer leg, 3 on the shorter leg, and 5 on the hypotenuse.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

What is sin 7x/4 ? i need on this urgent trig