Answer:
Subtract 50 from the previous number.
a
answer is 3
60x-80 x=-60
-20 x=-60
x= 3
9.38cm
Step-by-step explanation:
you have a right triangle. use pathagorean
x^2 + 9^2 = 13^2
x^2 + 81 = 169
x = √88
x = 9.38
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