Evaluate for the value of the variable(s) indicated.-2a + 3b for a = 
and b = - 
A. - 2
B. 1
C. - 
D. - 
Answer: A
Mathematics
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Solve the problem.A spring on a horizontal surface can be stretched and held 0.5 m from its equilibrium position with a force of 50 N. How much work is done in compressing the spring 2.5 m from its equilibrium position?
A. 625 J B. 125 J C. 312.5 J D. 62.5 J
Mathematics
Find the unit vector that has the same direction as the vector v.v = 12i + 5j
A. u = 156i + 65j
B. u = 
i + 
j
C. u = 
i + 
j
D. u = - 
i - 
j
Mathematics
Write the first five terms of the sequence described.Arithmetic, with a1 = 21, d = 7
A. 21, 7, 56, 84, 112 B. 21, 28, 35, 42, 49 C. 7, 28, 49, 70, 91 D. 21, 7, 35, 42, 49
Mathematics
Find the derivative of the function.y = 
A. y' = - 
B. y' = - 
C. y' = 
D. y' = - 
Mathematics