Use row reduction to find the inverse of the given matrix, if it exists. Check your answer by multiplication.
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What will be an ideal response?
Mathematics
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Use a calculator to find the acute angle between the planes to the nearest thousandth of a radian.7x - 2y - 9z = 1 and- 5x + 8y - 8z = -1
A. 1.424 rad B. 0.882 rad C. 0.147 rad D. 1.543 rad
Mathematics
Provide an appropriate response.
What percent of the yearly sales was the sales for October-December? 
A. 25% B. 22.6% C. 20.2% D. 32.0%
Mathematics
Provide an appropriate response.Prove that the function f is not one-to-one.f(x) = x2 + 2
What will be an ideal response?
Mathematics
Solve the exponential equation.72x = 718.4
A. 64.4 B. 9.2 C. 7 D. -9.2
Mathematics