Answer:
hi
Step-by-step explanation:
thx for the points
:)
Answer:
parentheses
Step-by-step explanation:
PEMDAS
Split in half 20 squared + 10 squared
then find the square root of the answer
10-/5
Answer:
The speed of jet in still air is 750 miles per hour and speed of wind is 130 miles per hour.
Step-by-step explanation:
Given that:
Distance traveled by jet against the wind = 2480 miles in 4 hours
Combined speed =
= ![\frac{2480}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B2480%7D%7B4%7D)
Combined speed = 620 miles per hour
Distance traveled with wind = 7040 miles in 8 hours
Combined speed = ![\frac{7040}{8}](https://tex.z-dn.net/?f=%5Cfrac%7B7040%7D%7B8%7D)
Combined speed = 880
Let,
Speed of jet = x
Speed of wind = y
When jet travels against the wind, the speed will be subtracted
x-y=620 Eqn 1
When jet travels with the wind, the speed will be added
x+y=880 Eqn 2
Adding Eqn 1 and 2
(x-y)+(x+y)=620+880
x-y+x+y=1500
2x=1500
Dividing both sides by 2
![\frac{2x}{2}=\frac{1500}{2}\\x=750](https://tex.z-dn.net/?f=%5Cfrac%7B2x%7D%7B2%7D%3D%5Cfrac%7B1500%7D%7B2%7D%5C%5Cx%3D750)
Putting x=750 in Eqn 2
750+y=880
y=880-750
y=130
Hence,
The speed of jet in still air is 750 miles per hour and speed of wind is 130 miles per hour.
Answer:
a)4
Step-by-step explanation:
(a+b)²=43 eqn 1
(a²+b²)=35 eqn 2
solving eqn 2 by putting the value of (a+b)² by eqn 1
- (a+b)²-2ab=35
- 43-2ab=35
- -2ab=35-43
- ab= -8/-2
- ab =4
hope it helps
<h2>stay safe healthy and happy.</h2>