Question

Find the value of x. Round your answer to the nearest tenth. (One number after the decimal.)

Answer 1

Answer:

x = ~8.9

Step-by-step explanation:

a^2 + b^2 = c^2

c is the long side

a and b are the other two shorter sides

this means

x^2 + 19^2 = 21^2

x^2 + 361 = 441

x^2 = 441- 361

x^2 = 441- 361

x^2 = 80

square root of 80 = ~8.9

x = ~8.9

Answer 2

Answer:

8.9

Step-by-step explanation:

$4\sqrt{5}$=8.9444

rounded = 8.9