Solve the system of equations by the substitution method.
A. {(-2, 8)}
B. {(2, 8)}
C. {(2, -8)}
D. {(-2, -8)}
Answer: A
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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 9 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 oats costs $10 and contains 20 lb of protein, 5 lb of fat, and 1 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. 0 sacks of soybeans and 4 sacks of oats
B.
| 2 sacks of soybeans and 0 sacks of oats |
C.
sacks of soybeans and 
sacks of oatsD.
sacks of soybeans and 
sacks of oatsSolve the equation for real values of the variable by factoring.
?
What will be an ideal response?
Find the x- and y-intercepts of f.f(x) = -x2(x + 2)(x2 + 1)
A. x-intercepts: -2, -1, 0; y-intercept: 2 B. x-intercepts: -2, -1, 0; y-intercept: -2 C. x-intercepts: -2, -1, 0, 1; y-intercept: 0 D. x-intercepts: -2, 0; y-intercept: 0
Graph the particular solution and several other solutions.
2y" + 3y' + y = 2 + cos 2x
