Does anyone have the answers to these questions? I would do them but I don’t have the time, please help, will mark brainliest.

1.
10²+7²= x²
100+49= x²
√149= √x²
12.21 = x

2.
19² + x² = 21²
361 +x² = 441
-361 -361
√x² = √80
x = 8.94

3.
16² + x² = 27²
256 + x² = 729
-256 -256
√x² = √473
x = 21.75

4.
12.8² + 5.3² = x²
163.84 + 28.09 = x²
√191.93 = √x²
13.85 = x

5.
9² + 20² = x²
81 + 400 = x²
√481 = √x²
21.93 = x

6.
17² + b² = 19²
289 + b² = 361
-289 -289
√b² = √72
b = 8.5

31 - 2(8.5)
31-17
x = 14

7.
16² + b² = 22²
256 + b² = 484
-256 -256
√b² = √228
b = 15.1

44-16 = 28

28² + 15.1² = x²
784 + 228 = x²
√1012 = √x²
31.81 = x

8.
3.5² + x² = 12²
12.25 + x² = 144
-12.25 -12.25
√x² = √131.75
x = 11.48

The sum is 2,160, no problem