Please help me with this question, will mark brainliest if correct, PLEASE HURRY, no links or you'll be reported :)

Step-by-step explanation:

A)

QRS also is equal to 42

since TQR andSQR =90

and QTS and SQT =90

then QTS =SQR

Then QRS=SQT=42

B) by phythagorous theorm but dont know how

Given

∠RQS and ∠TQS are complementary with ∠TQS, so are 48°

a)

b)

Find QS first

Find QT next

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b