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How do you prove that 1021 is the multiplicative inverse of 2.1?
A multiplicative inverse (or reciprocal) is a number 1/x which when multiplied by x yields the multiplicative identity (1). 2.1 = 2 and 1/10 = 21/10 21/10 x 10/21 = 210/210 = 1
What is 5 to the 21st power mulitplied by 4 to the 11th power?
(5)21 x (4)11 = (5)11 x (5)10 x (4)11 = (5)10 x (5 x 4)11 = (5)10 x (20)11 =(5)10 x 20 x (20)10 = 20 x (5 x 20)10 = 20 x (100)10 = 2 x (10)1 x (10)20 =2 x (10)21 = 2,000,000,000,000,000,000,000
What is the value of x in 6 over 21 and 10 over x?
x=35How I got the answer:What is the value of x? Given the following:6/21 = 10/xFirst cross mutiply6 * x = 6x = 10 * 21so 6x = 210Then divide both sides by 6 and you'll get x=35Proof x = 35:6 / 21 = 0.285714286,10 / 35 = 0.285714286, and 0.285714286 = 0.285714286.
If x equals 2 and y equals 7 then 5x plus 3y equals?
x=2 y=7 5x+3y= 5 7 x 2 x 3 ____ _____ 10 21 21 + 10 _______ 31
How much can 2 go into 21?
10 times with 1 remaining 21 - 1 = 20 = 2 x 10
