A tetrahedron is a shape made out of four triangular faces, and it has a total of <span>six edges
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Answer:
like:-
1/9x20 = <u>2 2/9</u>
1/9-20 = <u>19 8/9 </u>
Step-by-step explanation:
<h3>
<u>I'm not sure</u></h3>
Answer:
b=9,a=12
Step-by-step explanation:
I solved by substitution:
b = 3/4a ---> plug this into the other equation
a + b = 21 is now a + 3/4a = 21
Reduce: 7/4a = 21
a = 12
Now solve for b:
b=3/4a is now b=3/4(12)
b=9
Answer:
C) 12%
Step-by-step explanation:
there are 25 ppl in this class. there are 3 ppl with 7 or 8 ppl in their family. 3/25=0.12=12%