Answer:
3k^3 + k^2 - 4k
Step-by-step explanation:
k * 3k^2 = 3k^3
k * k = k^2
k * -4 = -4k
3k^3 + k^2 - 4k
<h2>
Greetings</h2>
Answer:
The other base is 8 feet.
Step-by-step explanation:
You need to recall the area of a trapezoid equation:
We need to work back, so we need to divide the area by 6:
60 ÷ 6 = = 10
Then we need to multiply this by two to find a + b value:
10 x 2 = a + b
20 = a + b
Beause we know the value of a, which is 12, we can factor this in:
20 = 12 + b
Move the +12 over to the other side, making it a negative:
20 - 12 = b
8 = b
<h3>So the other base is 8 feet!</h3>
<h2>Hope this helps!</h2>
Answer:
2 1/3 hours or 2 hours 20 minutes.
51.4 mph to 1 decimal place.
Step-by-step explanation:
Time = distance speed
First 50 miles time taken = 50 / 60 = 5/6 hours
Second 50 miles - time = 50/40 = 5/4 hours.
Final 20 miles - time taken = 20 / 80 = 1/4 hours.
Total time taken = 5/6 + 5/4 + 1/4
= 5/6 + 6/4
= 10/12 + 18/12
= 28/12
= 7/3 or 2 1/3 hours or 2 hours 20 minutes.
Average speed = total distance / total time
= 120 / 7/3
= 120 * 3/7
= 51.4 mph to 1 decimal place.
Angles: 42°, 114°, 24°, 30°, 150°.