Suppose an n×n matrix a has determinant equal to 1. which of the following statements is true? check the correct answer(s) below. a. the system ax=b has a unique solution for all b in rn b. the matrix a is invertible c. the reduced row echelon form of the matrix a is the identity matrix d. the matrix a is singular. e. the homogeneous system ax=0 has infinitely many solutions f. none of the above

The data in the table represent the height of an object over time. which model best represents the data? height of an object time (seconds) height (feet) 05 1 50 2 70 3 48 quadratic, because the height of the object increases or decreases with a multiplicative rate of change quadratic, because the height increases and then decreases exponential, because the height of the object increases or decreases with a multiplicative rate of change exponential, because the height increases and then decreases

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

Acylinder has volume 45π and radius 3. what is it’s height?