Si a=6, b=7.5 y c= -2, calcula:

a + 2b + 3c =
2a + 3b =
ab + c =

If 90° < θ < 180° and cotθ = -1/3, then cscθ =

Ricardo ran the 400 meter race 3 times his fastest time was 54.3 seconds his slowest time was 56.1 seconds if his average time was 55.0 seconds what was his time for the third race

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.