Determine whether each of the following sets are subspaces of r3 under the operations of addition and scalar multiplication defined on r3. justify your answers
w1={(a1,a2,a3)∈r3: a1=3a2 and a3=−a2}

What is the missing constant term in the perfect square that starts with x^2 -20x

You are making a blueprint of your bedroom and you plan to use a scale factor of 18 . the actual width of your room is 14 feet and the actual length of your room is 16 feet. determine the width and length of your room on the blueprint. on the blueprint, your room will have a width of feet and a length of feet.

Is the power produced directly proportional to the wind speed, give reasons for your answer?