document.write( "Question 388501: An electric company charges $7.70 per month plus 15 cents for each kilowatt hour (kwh) of electricity used. Find a function that gives the mean cost per kwh, -c (that is a c with a line over it), when using n kwh.
\n" ); document.write( "(Express in dollars.)
\n" ); document.write( "-c (not negative c, but, c with a line over it) = ___________\r
\n" ); document.write( "\n" ); document.write( "Let f(x) = x^2 - 7 an g(x) = 6x-2. Find the value, if possible. (If not possible, enter IMPOSSIBLE.)
\n" ); document.write( "(f+g)(-5) = ___________\r
\n" ); document.write( "\n" ); document.write( "Let f(x) = 4x-4 and g(x) = 4x-4. Find the value.
\n" ); document.write( "(g * f)(-6)= _________________\r
\n" ); document.write( "\n" ); document.write( "This is all the same problem, the -c is a c with line over it, I didn't know how to make my keyboard do that. Thank you!!!! \n" ); document.write( "

Algebra.Com's Answer #274869 by Alan3354(69443) $\"\"$ $\"About$

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C = cost
\n" ); document.write( "C = 7.70 + 0.15n
\n" ); document.write( "-----------------
\n" ); document.write( "Let f(x) = x^2 - 7 an g(x) = 6x-2. Find the value, if possible. (If not possible, enter IMPOSSIBLE.)
\n" ); document.write( "(f+g)(-5)
\n" ); document.write( "f(-5) = (-5)^2 - 7 = 18
\n" ); document.write( "g(-5) = 6*(-5) - 7 = -37
\n" ); document.write( "f(-5) + g(-5) = -19
\n" ); document.write( "----------------------
\n" ); document.write( "Let f(x) = 4x-4 and g(x) = 4x-4. Find the value.
\n" ); document.write( "(g * f)(-6)
\n" ); document.write( "g(-6) = 4*(-6)-4 = -28
\n" ); document.write( "f(-6) = -28
\n" ); document.write( "f*g = 784 \n" ); document.write( "

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