We are tasked to solve for the area of the trapezoid-shaped attic and the formula that we can use is shown below:
Area = ((a+b)/2)*h where "a and b" is for the base and "h" is for the height
We have the given values:
a=14 feet
b=20 feet
h=8 feet
Solving for the area:
Area =(14+20)/2 *8
Area = 136 feet²
The answer is 136 feet².
If the amount of time taken to go said distance is x and the amount of time taken to go back said distance is y, then the amount of miles total is 7x+3y due to that for every hour, she adds 7 miles when going there and 3 miles for walking back. In addition, since the total amount of time is 4 hours, x+y=4 as the total time spent as well as 7x=3y due to that they're the same distance.
x+y=4
7x=3y
Dividing the second equation by 7, we get x=3y/7. Plugging that into the first equation, we get 3y/7+y=4=10y/7 (since y=7y/7). Multiplying both sides by 7 and then dividing both by 10, we get 28/10=2.8=y in hours. Since 0.1 hours is 60/10=6 minutes, and 0.8/0.1=8, 6*8=48 minutes=0.8 hours, meaning that she should plan to spend 2 hours and 48 minutes walking back
Answer:
Step-by-step explanation:
52 + 14 < 3x
66 < 3x
66/3 < x
22 < x
Answer:
5x + 16
Step-by-step explanation: