Find the acute angle between the lines.(1 + ) x + (1 - ) y = -18 and  x + y = 15

A. 30°
B. 75°
C. 45°
D. 60°


Answer: C

Mathematics

You might also like to view...

Evaluate the indicated partial derivative at the given point.z = 8

A.
B. 160
C. 120
D.

Mathematics

Which property or identity justifies the statement?Exactly one of the following holds: < ,   = , or   > .

A. Trichotomy Identity B. Closure Property C. Density Property D. Transitive Property

Mathematics

In work with alternating current, complex numbers are used to describe current I, voltage E, and impedance Z. These three quantities are related by the equation E = IZ. Solve the equation E = IZ for the missing variable.I = 6 + 5i, E = 30 + 44i

A. Z =  -  i
B. Z =  +  i
C. Z = -  +  i
D. Z =  +  i

Mathematics

Solve the equation.x +  = 

A.  
B.
C.  
D. 2 

Mathematics