12 points! ! angle pqr is rotated 90 degrees counterclockwise about the origin to form angle p′q′r′. which statement shows the measure of angle p′q′r′? a m∠p′q′r′ = 90 degrees b m∠p′q′r′ = 180 degrees c m∠p′q′r′ = m∠pqr d m∠p′q′r′ = 2 ⋅ m∠pqr

C

Step-by-step explanation:

im smart boi

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

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3