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Solve -2X - 4 10?
-2x -4 = 10 -2x = 14 -x = 14/2 -x = 7 x = -7 easy.
What are the 2 numbers if the arithmetic mean is 7 and the geometric mean is 3?
(x+y)/2=7; x+y=14; y=14-x 3=√(xy); xy=9; y=9/x Use substitution: 14-x=9/x; 14x - x2=9; x2 - 14x +9=0 Use the quadratic formula: x=[14±√(196-36)]/2; x=[14±√160]/2; x=[14±4√10]/2 x=7+2√10 or x=7-2√10 If x=7+2√10, then y=14-(7+2√10)=7-2√10 If x=7-2√10, then y=14-(7-2√10)=7+2√10 The first pair's geometric mean is √[(7+2√10)(7-2√10)]=√[72-(2√10)2]=√(49-40)=√9=3. The first pair's arithmetic mean is (7+2√10 +7-2√10)/2=14/2=7 The second pair's geometric mean is √[(7-2√10)(7+2√10)]=√[72-(2√10)2]=√(49-40)=√9=3. The second pair's arithmetic mean is (7-2√10 +7+2√10)/2=14/2=7 That's it!
What is 7 over 50 as a percent?
7/50 x 100 Cancel down by '10' 7/5 x 10 Cancel down by '5' 7/1 x 2 = 14/1 = 14%
What is the prime factorizations of 10 and 14?
2 x 5 = 10 2 x 7 = 14
What is the biggest fraction out of 25 57 710?
2/5 x 14/14 = 28/70 5/7 x 10/10 = 50/70 7/10 x 7/7 = 49/70 biggest is 5/7
