Answer:
B.) 4.18 square inches
Step-by-step explanation:
Find the area of the one right triangle and multiply it by two. The formula for the area of a triangle is:

Insert the values. 1.1 is the base and 3.8 is the height:

Simplify:

Multiply the area of one triangle by two:

The total area of the shaded figures is

:Done
Answer:
k = 11
Step-by-step explanation:
f(x)=3x+k,
We know the input is -1 so replace x with -1 and the output is 8 so replace f(x) with 9
8 = 3(-1) +k
8 = -3+k
Add 3 to each side
8+3 = -3+3+k
11= k