I am so confused, can someone help

Well for A, move all terms that don't contain the valiable 'y' to the right side and solve.

Y = 9 − x/2

Or

Y = 9 −

For B, it's really similar to A, just isolate the variable 'h' by dividing each side by factors that don't contain the variable 'h', you get the answer,

H = 2a/b

Or

For C, it's exactly the same with B. Isolate the variable 'X' by dividing each side by factors that don't contain the variable 'X', the answer you have is,

X = y/4 - 3/4

Or

X = −

The orthogonal decomposition of vector with respect to vector  is

From the Question we are told that

Vector

Vector

Generally in the orthogonal decomposition of b to a we have

Where

Therefore

in Conclusion

The orthogonal decomposition of vector with respect to vector  is

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