Solve the problem using two linear equations in two variables and Cramer's rule.A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 4% cement should he mix with 4 bags of 17.5% cement to produce a mix containing 7% cement?
A. 14 bags
B. 23 bags
C. 18 bags
D. 16 bags
Answer: A
Mathematics
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Which method should be used to solve the system? Explain your answer, including a description of the first step. x2 - 3y2 = 497x2 - 7y2 = 9
What will be an ideal response?
Mathematics
Find the function f given that the slope of the tangent line to the graph of f at any point 
is 
and that the graph of f passes through the given point.
?
; 
?
A. ?
B. 
C. ?
D. 
Mathematics
Solve.x5 - 25x3 ? 0
A. (-?, -5] ? [5, ?) B. [-5, 0] ? [5, ?) C. (-?, -5] ? [0, 5) D. [-5, ?)
Mathematics
The given pattern continues. Write down the nth term of the sequence {an} suggested by the pattern.
, 
, 
, 
, 
, ...
A. an = 
B. an = 
C. an = 
n-1
D. an = 
Mathematics