The heights of women in the united states are normally distributed computations. with a mean of 64 inches and a standard deviati
on of 2.75 inches. the percent of women whose heights are between 64 and 69.5 inches, to the nearest whole percent, is
1 answer:
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Answer:
Step-by-step explanation:
Many scientific and graphing calculators will compute this easily.
The inverse of a square matrix is a square matrix of the same dimensions. That eliminates choices C and D. We can check choices A and B by computing a couple of terms of the product of the given matrix and its "inverse". That product should be the identity matrix, with 1 on the diagonal and 0 elsewhere.
Using matrix A,
(r, c) = (1, 1) = 1(-19) +2(15) +5(-2) = -19 +30 -20 = 1 . . . . correct
(r, c) = (2,3) = 3(-7) +5(6) +9(-1) = -21 +30 =9 = 0 . . . . correct
Using matrix B,
(r, c) = (1, 1) = 1(-19) +2(-2) +5(15) = -19 -4 +75 = 52 . . . . incorrect
Indications are that choice A is appropriate.
<em>Answer and Step-by-step explanation:</em>
<em>For this equation the answer is : </em>
<em>Step 1 : Simplify both the sides of the equation :</em>
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<em> (Distribute)</em>
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<em> (Combine the like terms)</em>
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<em>Step 2 : Add "" to both the sides :</em>
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<em>Step 3 : Subtract "" from both the sides :</em>
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<em>Step 4 : Divide both the sides by ""</em>
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<em>That's your final answer : </em>