Answer: $262.50
Step-by-step explanation:
We calculate the speed by dividing the distance over time:
s = d/t
So the distance described in the problem is always the same, A to B and B to A.
But we are told that;
7 = d/t
7 = 2d/(t + 2)
that is, the first equation say that at speed 7 km/h a distance d is walked in a time t
the second equation say that at a average speed of 7 (that is 8 on one way and 6 in the other: 8 + 6 = 14, half of it), twice the distance is walked in a time equal to the first time plus 2 minutes.
So we have a system of linear equations, 2 of them with two unknowns, we can solve that:
7 = d/t
7 = 2d/(t + 2<span>)
</span>lets simplify them:
7t = d
7(t + 2) = 2d
7t = 2d - 14
we substitute the first in the second:
<span>7t = 2d - 14
</span><span>7t = d
</span>so:
d = 2d - 14
d = 14
so the distance between A and B is 14 km
Answer:
103
Step-by-step explanation:
Answer:
the area is 110. the formula for a trapezoid is <em>A</em><em>=</em><em> </em><em>a</em><em>+</em><em>b</em><em>/</em><em>2</em><em> </em><em>×</em><em> </em><em>h</em><em>.</em><em> </em>
<em>A</em><em>=</em><em> </em><em>a</em><em>+</em><em>b</em><em>/</em><em>2</em><em> </em><em>×</em><em>h</em><em>=</em><em> </em><em>A</em><em>=</em><em> </em><em>9</em><em>+</em><em>1</em><em>3</em><em>/</em><em>2</em><em>×</em><em>1</em><em>0</em><em>=</em><em>1</em><em>1</em><em>0</em>
Use this and explain yourself
Answer:
Distance= 21.21
Step-by-step explanation:
