Solve system of linear equations by eliminating x or y terms. Determine the correct first step. x−4y=−83x+4y=0 Choose the correct answer:
A. Eliminate y first
B. Both approaches are valid
C. Add 4y to first equation first
D. Eliminate x first
E. Both approaches are valid
Find the number of units the company must sell to break even, where revenue R(x)=50x and cost C(x)=32.5x+52,500. (a) The break-even point is x=1,500 units.
Identify the logarithm expressions that are undefined and positive. List the letters of the correct choices, separated by commas. If none are undefined, write "none". If none are positive, write "none". log11(0.2), log11(−2), log11(113) are undefined.
log11(127), log11(6) are positive.