Let b and s be the velocity of the boat and stream respectively....
3(b-s)=27
b-s=9
b=9+s we will use this in the second equation....
2(b+s)=30
b+s=15, now use b found above in this to get:
9+s+s=15
2s+9=15
2s=6
s=3, and since from earlier b-s=9, b=9+s so
b=12
So the speed of the boat is 12mph and the stream is 3 mph
The line of best-fit that represents the relationship between velocity and time is:
v = 2.19t + 6.7.
<h3>How to find the equation of linear regression using a calculator?</h3>
To find the equation, we need to insert the points (x,y) in the calculator.
For this problem, the points (t,v) are given as follows:
(0, 6.1), (2.1, 12.2), (5.3, 17.4), (8.2, 26.4), (10, 28.1), (12.1, 32.8).
Hence, inserting these points into a calculator, the equation is given by:
v = 2.19t + 6.7.
More can be learned about a line of best-fit at brainly.com/question/22992800
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Answer:
Volume of the shown pyramid is 40 square centimetre.
Step-by-step explanation:
Given:- From given figure we can see that,
Base length of the pyramid (L) = 5 cm.
Base width of the pyramid (W)= 4 cm.
Height of the pyramid (H)= 6 cm.
To find:- Volume of the pyramid = ?
Solution:-
Let, Base length of the pyramid be L,
Base width of the pyramid be W,
and height of the pyramid be H
Now,
Formula for volume of pyramid = 
Volume of pyramid = 
Volume of pyramid = 
Volume of pyramid = 
Volume of pyramid = 40 sq.cm.
Therefore volume of the shown pyramid is 40 square centimetre.
Answer:
15
Step-by-step explanation:
step 1: 25+5=30
step 2: 30-8=22
step 3:22-7=15
