<u>Answer:</u>
x = 8
<u>Explanation:</u>
-x + 1 = -7 Subtract one from each side
-x = -8 Divide each side by -1 to get x by itself
x = 8
Answer:
(x - 9)(x + 8)
Step-by-step explanation:
Given
x² - x - 72
Consider the factors of the constant term (- 72) which sum to give the coefficient of the x- term (- 1)
the factors are - 9 and + 8, since
- 9 × 8 = - 72 and - 9 + 8 = - 1, thus
x² - x - 72 = (x - 9)(x + 8)
Answer:
D(t) = 2,280 - 60t
for D(15) compare the eqns and substitute the value of t.
D(15) = 2,280 - 60(15)
D(15) = 1,380 miles.
In the context of the qn, the Chang family travels 1,380 miles in 15 hours.
The image doesn't load for me.
Answer:
6.33 m/s
Step-by-step explanation:
Given that,
The world record for the men’s 10000 meters was 26 minutes 17.53 seconds.
Distance = 10000 m
Time, t = 26 minutes 17.53 seconds = 1577.53 s
We need to find the average speed throughout the race. It is equal to total distance divided by total time taken.
![v=\dfrac{10000\ m}{1577.53\ s}\\\\=6.33\ m/s](https://tex.z-dn.net/?f=v%3D%5Cdfrac%7B10000%5C%20m%7D%7B1577.53%5C%20s%7D%5C%5C%5C%5C%3D6.33%5C%20m%2Fs)
So, the average speed is 6.33 m/s.