Prove that a square matrix is invertible if and only if its columns are linearly independent

15 divided by 0.25 equals?

What is the following product? ^4 sqrt 7 x ^4 sqrt 7 x ^4 sqrt 7 x ^4 sqrt 7

John used 1 3/4 kg of salt to melt the ice on his sidewalk. He then used another 3 4/5 kg on the driveway. If he originally bought 10 kg of salt, how much does he have left? PS: Solve the problem using the RDW strategy. Show all of your work.

Evaluate the function rule for the given value. y = 15 • 3^x for x = - 3

What is 5 times 10 to the fifth?

Using the distributive property, what is the best way to multiply 8 by 7?

A certain confidence in interval is 7.05

Find the median of the test scores: 95, 65, 80, 95, 70, 65, 35, 70, 60, 70, 95.

7x+8 (x+1/4) = 3 (6x-9) - 8 need a solution for this problem

Find the GCF o the first two terms and the GCF of the last two terms of the polynomial. 5h 3+20h 2+4h+16