AB and CD intersect at Q and R is in the interior of angle AQC. If the measure of angle DQA = 2x-y, the measure of angle AQR = x and the measure of angle RQC = y, find the values of x and y so that AB is perpendicular to CD.

Which matrix multiplication is possible?

Consider the reaction 2x2y2+z2⇌2x2y2z which has a rate law of rate= k[x2y2][z2] select a possible mechanism for the reaction.

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)