Plz ! which is the value of (f o )? f(x)=2x+1; g(x)=x^2 a.) -49 b.) 51 c.) 11 d.) -19 added the photo for reference. thx for the ! i will give brainliest!

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2