Answer:
<em>Scott will take 221 minutes to run 52 km</em>
Step-by-step explanation:
<u>Speed</u>
The speed of an object can be calculated with the formula:

Where d is the distance traveled and t is the time taken.
Scott can run d=20 km in 85 minutes. Thus, his speed is:

Now he wants to know how many minutes it will take him to run d=52 km. Solving the formula for t:

Since the speed has been already determined:

Multiplying by the reciprocal of the denominator:

t = 221 min
Scott will take 221 minutes to run 52 km
Answer:
Step-by-step explanation:
area of top=7×6=42 yd²
area of bottom=3×6=18 yd²
area of two rectangles=2[4×6]=48 yd²
area of two trapezoids=2[1/2(7+3)×3.5]=35 yd²
total surface area=42+18+48+35=143 yd²
Did you plug it into your calculator? That's a great place to start.
78 is the correct answer.
Answer:

Step-by-step explanation:
We are given the equation:

and asked to solve for
. Therefore, we must isolate the variable on one side of the equation.
is being multiplied by 5. The inverse of multiplication is division. Divide both sides of the equation by 5.



Let's check our solution. Plug 3 in for x and solve.


This checks out, so we know our solution is correct.
The solution to 5x=15 is x=3.