Answer:
Brian's rate is 15 km/hr
Adrian's rate is 16 km/hr
Step-by-step explanation:
Let r = Brian's rate
r + 1 = Adrian's rate
4/r = Brian's time
4/(r + 1) = Adrian's time
The difference in times is 1 min = 1/60 hr
LCD = 60r(r + 1)
4(60)(r + 1) - 4(60)r = r(r + 1)
240r + 240 - 240r = 
+ r
+ r - 240 = 0
(r - 15)(r + 16) = 0
r = 15 or r = -16
Since the rate cannot be negative, Brian's rate is 15 km/hr and Adrian's rate is 16 km/hr
About 10 gallons is your answer
Answer:
2.5 times z = 10, or 2.5<em>z </em>=<em> </em>10
Step-by-step explanation:
Below is step-by-step in how i got my answer.<span>6.3−<span>2<span>(<span><span>1.5c</span>+4.1</span>)</span></span></span>Distribute:<span>=<span><span>6.3+<span><span>(<span>−2</span>)</span><span>(<span>1.5c</span>)</span></span></span>+<span><span>(<span>−2</span>)</span><span>(4.1)</span></span></span></span><span>=<span><span><span><span>6.3+</span>−<span>3c</span></span>+</span>−8.2</span></span>Combine Like Terms:<span>=<span><span>6.3+<span>−<span>3c</span></span></span>+<span>−8.2</span></span></span><span>=<span><span>(<span>−<span>3c</span></span>)</span>+<span>(<span>6.3+<span>−8.2</span></span>)</span></span></span><span>=<span><span>−<span>3c</span></span>+<span>−1.9</span></span></span><span>Your answer is in Bold
~Good Luck~</span>
