Answer:
Speed of plane in still air = 825 km/h
Step-by-step explanation:
Given:
Speed of plane with the wind is 145 km/h faster than what it would have with still air.
Speed of plane with wind = 970 km/h
To find speed of plane in still air.
Solution:
Let speed of plane in still air be = 
km/h
Thus speed of plane with wind would be given as = 
km/h
Speed of plane with wind is given =970 km/h
So, we have:
Solving for .
Subtracting both sides by 145.
∴ 
km/h (Answer)
Thus, speed of plane in still air = 825 km/h
Convert everything to sine and cosine.
Answer:
$32
Step-by-step explanation:
400 dollars
10 percent of 400=40
5 percent of 400=20
1 percent of 400=4
4 times 8=32
400-32=$368
32 is the sale tax
Answer:
For the first one: 2+3(1) = 5
Second one: 5=5
Third one: 1 = -2 + 3
Last one: 1=1
Step-by-step explanation:
7,159=s problem A
8,946-7,150=1,796 Problem B
This is reasonable because I did everything step by step Problem C
Problem 1. the answer is 4,307+1,614=5,921
Problem 2. the answer is 5,036-2,149=2,887
Step-by-step explanation:
hope this helps and hope you work it out with your mom
