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01.08.2019 •
Mathematics
Use proportional reasoning to determine the value of a in the proportion shown below. 3/5=a+5/25 a = 1 a = 25 a = 10 a = 15
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Ответ:
3/5=(a+5)/25
3/5=(5/5)*(3/5)=15/25
therefore
15/25=(a+5)/25
15=a+5 > a=10
the answer is the option a = 10
Ответ:
70°
Step-by-step explanation:
RSTU is a kite,
m∠R= 130m∠S=80m∠T=?Sum of 4 internal angles= 360°
m∠U=m∠S=80
m∠T= 360° - (130°+80°+80°)= 70°