Roberto evaluated 34 ÷ 45 and got an answer of 1516. Which statement is true about his answer?
2 answers:
You might be interested in
Answer AND Step-by-step explanation:
Everything is in the picture.
<em><u>#teamtrees #PAW (Plant And Water)</u></em>
<em><u></u></em>
<em><u></u></em>
<u>The equation is:</u>
<u /><u />
Try this solution:
Answer: 6 & 4.5 (m-per-h)
Step-by-step explanation:
- The basic formula used in this task is S=V*t, where S - distance, V - speed, t - time.
- the downstream speed is: V+Vc, where V - the speed of the boat in still water, Vc - the speed of the current.
- the upstream speed is: V-Vc.
- according to the described above the distance for downstream is S1=(V+Vc)*t1, where t1=10; the distance for upstream is S2=(V-Vc)*t2, where t2=70.
- for whole travel down- and upstream: S=S1+S2.
- Using these it is possible to make up the system of the equations:
V - the speed of the boat in still water - 6 miles per hour, Vc - the speed of the current - 4.5 miles per hour. All the details for the system of the equations are in the attachment.
It's goofy to subtract perimeter and area; they're in different units. We persist.
The area is and the perimeter is
. so the difference is
Answer: choice A