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bercishicicorbin
20.07.2019 •
Mathematics
In δabc, ∡a is a right angle, and m∡b = 45°. what is the length of bc? if the answer is not an integer, leave it in simplest radical form. the diagram is not drawn to scale.
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Ответ:
BC² = 121 + 121
BC² = 242
BC = √242
BC = 11√2
11√2
Ответ:
x + y = 3.36 --> the boys are splitting $3.36
x = 3y - .12 --> one boy received $.12 less than 3 times as much as the other
--> substitute the second equation for the x in the first equation
(3y - .12) + y = 3.36 --> combine like terms
4y - .12 = 3.36 --> add .12 to both sides of the equation
4y = 3.48 --> divide both sides by 4
y = .87
the other boy gets $0.87
substitute into x = 3y - 12
x = 3(.87) - .12
x = 2.61 - .12
x = 2.49
the first boy gets $2.49