Using the formula a² + b² = c² but reversing it to c² - b² = x² where x replaces the a for comprehension reasons
so this is the formula
c² - b² = x²
insert the numbers on the triangle in the picture
21² - 8² = 377
since 377 is squared and not the side length, we need to square root it to find x
√377 = 19.4~
Answer: x = 19.4
Answer:
2,-1.5
Step-by-step explanation:
To find the midpoint of a line segment, take the average of the x coordinates and y coordinates of the two points that make it up.

=

=2,-1.5
Answer:
the anwser is H
Step-by-step explanation:
- frist x^2=16 it means the radical of 16 is x
the radical of 16 is《 4》
♧x^3 it means 4^3=64
the radical of 4 is 2
- then 64+2=66
f(x) cannot be 0 or less than zero, but can approach+ infinity
Answer is (0, ∞)