Answer:
x² + 2x - 15 = 0
x² + 2x + 1 = 16
(x + 1)² = 16
You can then go forward with that to solve it:
x + 1 = √16
x = -1 ± √16
x = -1 ± 4
x = 3, -5
Step-by-step explanation:
(3X-20)+(3X+5)=111(( SINCE 111 IS TOTAL ANGLE
6X-15=111
6X=126
X=21
EFG=3×21-20
=63-20=43
Given data:
The given radius of sphere is r=9.
The volume of the sphere is,
![V=\frac{4}{3}\pi(r)^3](https://tex.z-dn.net/?f=V%3D%5Cfrac%7B4%7D%7B3%7D%5Cpi%28r%29%5E3)
Substitute the given values in the above expression.
![\begin{gathered} V=\frac{4}{3}\pi\times(9)^3 \\ =972\pi \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20V%3D%5Cfrac%7B4%7D%7B3%7D%5Cpi%5Ctimes%289%29%5E3%20%5C%5C%20%3D972%5Cpi%20%5Cend%7Bgathered%7D)
Thus, the volume of sphere is 972π.
1 yard=3 feet
5 yards to feet
5 yards times 3=15 feet
1 mile=5280 feet
15/5280 miles per second
1 hour=60 minutes
1 minute=60 seconds
1 hour=60 times 60 seconds=3600 seconds
1 hour=3600 seconds
divide both sides by 3600
1/3600hour=1 second
(15/5280)miles per (1/3600) hour
![\frac{ \frac{15}{5280} }{ \frac{1}{3600} }](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20%5Cfrac%7B15%7D%7B5280%7D%20%7D%7B%20%5Cfrac%7B1%7D%7B3600%7D%20%7D%20)
invert and multiply
![\frac{15}{5280}](https://tex.z-dn.net/?f=%5Cfrac%7B15%7D%7B5280%7D%20)
times
![\frac{3600}{1}](https://tex.z-dn.net/?f=%20%5Cfrac%7B3600%7D%7B1%7D%20)
=
![\frac{ 54000}{5280}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%2054000%7D%7B5280%7D%20)
=
![\frac{ 225}{22}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20225%7D%7B22%7D%20)
=10.2273 miles per hour
Answer:
D
Step-by-step explanation:
So 5(2+7) equals 45
A. 2(5+7)=24
B. 2+7(5)=37
C. 5(2)+7=17
D.5(2)+5(7)=45
Only D equals 45
Hope I helped :D