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How do you get the answer 7 if you can only use the numbers 1 4 9 and 2?
9 - (4 - 2) * 1 = 7
What is the distance between the two points 7 7 and 4 3?
Use Pythagoras: distance = √(difference_in_x^2 + difference_in_y^2) = √((4 - 7)^2 + (3 - 7)^2) = √((-3)^2 + (-4)^2) = √(9 + 16) = √25 = 5 units.
What is 20-2n when n equals 7?
20-2n when n = 7. just take 20-2(7) replace n with 7. then use the PEMDAS rule. 2(7) = 14, then 20-14 = 6
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!
How can you use doubling to find the product of 4 times 7?
since 4 is 2 times 2 just double 7 twice: 7 doubled = 14 and then 14 double = 28
What is the rule for multiples of 7?
use the tens place to multiply by 2, then use the number to subtract the ones place.The answer can be divided by 7, if not it will be 0.use 490 as an example.9x2=18.18-4=14.14 divided by 7 is 2. so 49 can be divide by 7
How do you get the answer 7 if you can only use the numbers 1 4 9 and 2?
9 - (4 - 2) * 1 = 7
What numbers you can use to get 720?
7, 2 and 0
There are 7 points on a circle how many line segments can be drawn joining the points?
Use the formula n(n-1)/2 --> 7(7-1)/2 = 7(6)/2 = 42/2 = 21.
What is the distance between the two points 7 7 and 4 3?
Use Pythagoras: distance = √(difference_in_x^2 + difference_in_y^2) = √((4 - 7)^2 + (3 - 7)^2) = √((-3)^2 + (-4)^2) = √(9 + 16) = √25 = 5 units.
How can you use multiplication facts about 1 and 2 to find 3x7?
1 x 7 plus 2 x 7 is the same as 3 x 7
How can you use 7 2 6 9 7 to get 24?
(6+7)x2=26... 26-(9-7)=24 !
How do you factor 2x2-7x-86?
Use the quadratic formula... [-b +/- sqrt(b^2 - 4ac)] / 2a You use this formula when you have a quadratic equation ( ax^2 + bx + c). In this case: a=2, b= -7, c= -86. Plug into the formula... [7 +/- sqrt(7^2 - 4(2)(-86))] / 2(2) = [7 +/- sqrt (737)] / 4 Equating this you get x = 8.537 and x = -5.037
What stratagey do you use to change customary linear units?
13 ft 7 in+ 2 ft 7 in=
How can you use 3x7 to get 6x7?
6 x 7 is equal to 2 x 3 x 7. If you find the solution to 3 x 7, you can multiply it by 2 to get 6 x 7.
2 7 9 2 use these digits to make A. The bigger number?
2,792
What fraction did Babylonians use for pi?
most likely 2/7
