Answer:
Step-by-step explanation:
So we have the formula:
And we want to make r the subject of the formula.
So, first, let's multiply both sides by (r-3). The right will cancel. So:
Distribute the t:
Subtract rt from both sides. The left cancels:
Factor out an r from the right:
Divide both sides by (1-t). The right cancels:
Simplify the negatives:
Flip:
And we're done!
8 and 10 because 8 x 5 equals 40 and 10 x 4 equals 40. and 10 minus 8 is two
Answer:
You have to eliminate one of the variables when the equations are added.
A) x + 2y + z = 10
B) 2x -y +3z = -5
C) 2x -3y -5z = 27
We mulutiply A) by 2 then add it to B and C
A) 2x + 4y + 2z = 20 and the sum =
6x = 42 Luckily, the "y" and "z" variables cancel out and we find:
x = 7
Then we use x =7 in calcucating equation A) and B)
A) 2y + z = 3
B) -y + 3z = -19
THEN solve for y and z by eliminating variables.
Step-by-step explanation:
-9w + 27y - 54
If that's all you need - You're just multiplying 9 with each number in the parenthesis! I hope all is well, and you pass! Good luck, rockstar. (:
The system of equations that can be used to determine the number of tetra fish and goldfish purchased is:
x = 2 y. 2 x + 1.5 y = 20
<h3>What are the system of equations ?</h3>
In order to determine the required values, two linear equations would be formed from the question. The two equations would exhibit the relationship between the two types of fishes:
The first equation would show the ratio between the two types of fishes bought: 2y = x
Th second equation would show the total cost of the two type of fish:1.5y + 2x = 20
To learn more about simultaneous equations, please check: brainly.com/question/16763389
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