lks715
12.01.2021 •
Mathematics
If x = 3 solves the system shown below, what must be the value of a?
(1) -4 (3) 3 y=5x-8
(2) -1 (4) 7 y=ax+19
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Ответ:
9.22
Step-by-step explanation:
Using Pythagoras' theorem
hyp² = side ² + side²
hyp² = 7² + 6²
hyp² = 49 + 36
hyp² = 85
hyp = sqrt of 85
hyp = 9.22