Let's solve for c.<span>a=<span><span>11+<span>4b</span></span>−<span>4c</span></span></span>Step 1: Flip the equation.<span><span><span><span>4b</span>−<span>4c</span></span>+11</span>=a</span>Step 2: Add -11 to both sides.<span><span><span><span><span>4b</span>−<span>4c</span></span>+11</span>+<span>−11</span></span>=<span>a+<span>−11</span></span></span><span><span><span>4b</span>−<span>4c</span></span>=<span>a−11</span></span>Step 3: Add -4b to both sides.<span><span><span><span>4b</span>−<span>4c</span></span>+<span>−<span>4b</span></span></span>=<span><span>a−11</span>+<span>−<span>4b</span></span></span></span><span><span>−<span>4c</span></span>=<span><span>a−<span>4b</span></span>−<span>11
480 since 1 hour=60 minutes. Look on the graph and you can see that the line looks like its 500 but since the answer choices dont say 500 it has to be 480 which is the closest
