Solve. If needed, round money amounts to two decimal places and all other amounts to one decimal place.How much pure acid should be mixed with 2 gallons of a 50% acid solution in order to get an 80% acid solution?
A. 1 gal
B. 3 gal
C. 8 gal
D. 5 gal
Answer: B
Mathematics
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Solve the equation.y + 
= -4
A. - 
B. -11
C. 
D. - 
Mathematics
Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = cos4 x
A. y = u4; u = cos x; 
= 4 cos3 x sin x
B. y = cos u; u = x4; 
= - sin(x4)
C. y = cos u; u = x4; 
= - 4x3 sin(x4)
D. y = u4; u = cos x; 
= - 4 cos3 x sin x
Mathematics
Multiply the monomials.2x7 ? 9x8
A. 36x15 B. 11x15 C. 18x56 D. 18x15
Mathematics
Graph the equation.y = 3x + 2
A. 
B. 
C. 
D. 
Mathematics