Solve the given equation for the indicated variable. (Leave ± in the answer, if appropriate)c = 
for E
A. E = ± c
B. E = ± 
C. E = mc2
D. E = mc
Answer: C
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Provide an appropriate response.Perform the operations and express in scientific notation. 
3
What will be an ideal response?
Add.
+ 948 + 8383
A. 
B. 9361
C. 9301
D. 
Solve the problem.Since 1960, the median age of men at their first marriage in a certain community has steadily increased. If x represents the the median age of these men at their first marriage, then x can be approximated by the formula 
where t represents the number of years since 1960. In what year will the median age of these men be 38 at first marriage? Round to the nearest year.
A. 1984 B. 2081 C. 2004 D. 1994
Use Gaussian elimination to solve the linear system by finding an equivalent system in triangular form.2x + 2y + z = -83x - 3y - z = 74x + y + 3z = -2
A. no solution B. (-1, -4, 2) C. (-1, 2, -4) D. (2, -4, -1)