Can someone help and can you also put the reason why it is the answer?

5 c = 45 , d = 97

Step-by-step explanation:

5) You know the entire triangle has a total of 180 degrees, you also know that angle c + 135 has to equal 180.

So for angle C, you will set up your formula c=180-135 = 45

Now you set up your formula for angle d.

180=angle c + angle d +38

180 = 45 + D + 38 -> D = 180-45-38 = 97

Follow the same steps for 6 and 7

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^