Solve the problem.Suppose an animal feed to be mixed from soybean meal and oats must contain at least 100 lb of protein, 20 lb of fat, and 12 lb of mineral ash. Each 100-lb sack of soybean meal costs $20 and contains 50 lb of protein, 10 lb of fat, and 8 lb of mineral ash. Each 100-lb sack of alfalfa costs $11 and contains 30 lb of protein, 8 lb of fat, and 3 lb of mineral ash. How many sacks of each should be used to satisfy the minimum requirements at minimum cost? Fractional sacks are allowed.
A. 2 sacks of soybeans and 0 sacks of alfalfa
B. 
sacks of soybeans and 
sacks of alfalfa
C. 0 sacks of soybeans and 4 sacks of alfalfa
D. 
sack of soybeans and 
sacks of alfalfa
Answer: D
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Find projv u.v = 3i - j + 3k, u = 2i + 10j + 11k
A. 
i + 
j + 
k
B. 
i - 
j + 
k
C. 
i - 
j + 
k
D. 
i + 
j + 
k
Provide an appropriate response.Which of the following statements is true?
A. The median is always one of the data points in a set of data B. The mean is always one of the data points in a set of data. C. The mode is always one of the data points in a set of data. D. None of the above is true
Decide whether the problem is an equation or an expression.9(4x + 4) - 3(7x - 7)
A. Equation B. Expression
Solve the equation using graphical methods. Round to the nearest thousandth when appropriate.
+ 
= x + 7
A. x = -10.909 B. x = -14.545 C. x = -18.182 D. x = -7.273