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8.1

Step-by-step explanation:

Since we dealing with right triangles, we are going to use pythagoern theorem.

+=, where a and b are the two legs and c is the longest side or the slanted side( known as hypotunese.)

Let plug in the numbers

4^2+ b^2=9^2

16+b^2=81

b^2=65

sqr root of 65 is about 8.1

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

7

step-by-step explanation: