I’m really behind in school because I was out sick please help I don’t understand this

answer:

9.22 cm

Step-by-step explanation:

use the Pythagorean theorem

a^2 + b^2 = c^2

c is the hypotenuse.  In this case 11

6^2 + b^2 = 11^2

36 + b^2 = 121

b^2 = 121-36 = 85

b = square root of 85

I feel like it is 12 but it probably is wrong

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this