What is the area of the wooden cutout of the lightning bolt ?

I'm so close to finishing all these.

Which equation and solution can be used to solve this problem? thirteen less than a number is sixteen. 13-n=16: add 13 to both sides. the answer is 29. n+13=16: subtract 13 from both sides. the answer is 3. n+16=13 subtract 13 from both sides. the answer is 3. n-13=16: add 13 to both sides. the answer is 29.

Which is an x-intercept of the graphed function? (0, 4) (–1, 0) (4, 0) (0, –1)