Mathematics
21.03.2021 12:28
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Zoe is thinking of her number3/10 of 90=1/2 of her numberWhat number is she thinking
Zoe is thinking of her number3/10 of 90=1/2 of her numberWhat number is she thinking of?
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Jana1517
4,4(33 marks)
I'm going to use the Pythagoras theorem
1. hypotenus²= base²+height²
h²=80²+18²
h²=6400+324
√h²=√6724
hypotenuse= 82
2. 53²=45²+h²
2809=2025+h²
2809-2025=h²
784=h²
√784=√h²
h=28
3. 40²=b²+24²
1600=b²+576
1600-576=b²
√1024=√b²
b= 32
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