UnusualKc5117
16.04.2021 •
Mathematics
What is the value of x in the diagram? A right angled triangle with base 2x+2, altitude x and hypotenuse 2x+3.
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Ответ:
x = 5
Step-by-step explanation:
x² + (2x+2)² = (2x+3)²
x² + 4x² + 8x + 4 = 4x² + 12x + 9
x² - 4x - 5 = 0
(x - 5)(x + 1) = 0
x = -1 This can be discounted as the answer because you cannot have a negative length
x = 5
Ответ:
20
Step-by-step explanation:
3m +5
3(5) +5
15 +5
20