Use the Gauss-Jordan method to solve the system of equations.4w + 4x - 4y - 4z = -4-w - 5x - 5y - z = -22w + 3x + 3y + 2z = -52w + 4x + 4y + 2z = 6

A. (-z, z, -z, z)
B.
C.
D. No solution


Answer: D

Mathematics

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Find the slope of the polar curve at the indicated point.r = 2 cos 3?, ? = 

A. - 
B.
C. -
D.

Mathematics

The amount remaining A, in grams, of a radioactive substance is a function of time t measured in years.  The equation of change for A is

?
.
?
A: What can you conclude about the function ?B: If  there are initially 48 grams of the substance present, find a formula that gives A in terms of t. Write your answer using the alternative form for an exponential function.C: How long will it take before only of the original amount is left?

What will be an ideal response?

Mathematics

Convert the numeral to a numeral in base 10.9412 

A. 1344 B. 1128 C. 112 D. 156

Mathematics

Perform the operation. Write the answer as a fraction in lowest terms. +  

A.
B.
C.
D.

Mathematics