Use the Gauss-Jordan method to solve the system of equations. x + y + z = 7 x - y + 2z = 7 2x + 3z = 15
A. No solution
B. (4, 2, 1)
C. (1, 2, 4)
D. (2, 1, 4)
Answer: A
Mathematics
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Find the formula for df-1/dx.f(x) = (10 - x)3
A. - 
B. -3(10 - x)2
C. 10 - x1/3
D. x2/3
Mathematics
A formula is given, along with values for all but one of the variables in the formula. Find the value of the variable that is not given. Round to the nearest hundredth when necessary.A = 
bh; b = 17, h = 19
A. A = 36.5 B. A = 161.5 C. A = 323 D. A = 36
Mathematics
Find the exact value of the expression if ? = 30°. Do not use a calculator.g(?) = cos ?Find g(2?).
A. 
B. 
C. 1
D. 
Mathematics
Decide whether the following is a statement or is not a statement.Go fly a kite.
A. Statement B. Not a statement
Mathematics