Answer:
![x= 23.775.](https://tex.z-dn.net/?f=x%3D%2023.775.)
Step-by-step explanation:
![\text{We have} \\\cos(18\textdegree) = \frac{x}{25} \\\Rightarrow x= 25\cos(18\textdegree)\\\Rightarrow x= 25 \times 0.951\\\Rightarrow x= 23.775.](https://tex.z-dn.net/?f=%5Ctext%7BWe%20have%7D%20%5C%5C%5Ccos%2818%5Ctextdegree%29%20%3D%20%5Cfrac%7Bx%7D%7B25%7D%20%5C%5C%5CRightarrow%20x%3D%2025%5Ccos%2818%5Ctextdegree%29%5C%5C%5CRightarrow%20x%3D%2025%20%5Ctimes%200.951%5C%5C%5CRightarrow%20x%3D%2023.775.)
Answer:
Option a and b both are correct.
Step-by-step explanation:
We have been given the information that is: n is added to 15 less than 3 times itself.
The result is 101.
So, the number is 15 less than 3 times to itself means: 3n-15
And n is added to it that means:
n+(3n-15)
And its result is 101 so,
n+(3n-15)=101
After simplification of above expression gives:
4n-15=101.
Therefore, Option a and b both are correct.
You need to find the total distance and the total time. The total distance is two times the distance to school, 2d.s=d/t=>t=d/sWhere s is speed, d is distance and t is time. So the time taken to get to school is:d/s1and the time taken to get back is:d/s2so the total time is:d/s1+d/s2=d(1/s1+1/s2)So, as speed = distance/time, divide the total distance by the total time:2d/d(1/s1+1/s2)=2/(1/s1+1/s2)=2/(1/20+1/40)=80/3≈26.7km/hr
Answer:
75ft²
Step-by-step explanation:
((10+15)/2) x 6=75
Hope this help! ;)