The correct answer is two thirds
Answer: 25
Assuming the dotted line touches the middle of the base of the triangle,
Using Pythagoras Theorem,
(30/2)^2 + (20)^2 = x^2
x^2 = (15)^2 + 400
x^2 = 625
x = √625 or -(√625)
x = 25 or -25
But since x needs to be a positive value,
x = 25
Answer:
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If she lost 1/3 of her bows and still had 42, that means she had 63 bows before school because 1/3 of 63 is 21 and 63-21=42. If she got 7 for her birthday then 63-7=56. She had 56 bows before her birthday