A/3=7/10
21=10a
a=2.1
100a=100*2.1=210
Answer:
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Step-by-step explanation:
To calculate slope; rise/run
Triangle ABC: run-1 rise-5 slope-5
5 rise/ 1 run (5/1)=5
Triangle DEF: run-2 rise 10 slope-5
10 rise/ 2 run (10/2)=5
B. They are equal because the two triangles are similar
2/9 • 3/4 • 2/5 = 1/15
1/15 of of the students are girl sopranos in chorus.