Answer:
Solution → (7, 3)
Step-by-step explanation:
Given system of equations is,
3x - y = 18 -------(1)
y = x - 4 ------- (2)
Substitution method is the best method to solve the given system of equations.
Substitute the value of y from equation (2) to equation (1)
3x - (x - 4) = 18
3x - x + 4 = 18
2x = 18 - 4
2x = 14
x = 7
From equation (2)
y = 7 - 4
y = 3
Solution of the system of equations will be (7, 3).
Answer:
radius = C / 2π :)
Step-by-step explanation:
The circumference is 2πr, right?
Let's put this information into an equation :)
C = 2πr
Now, we can simply divide both sides by 2π here to isolate r (the radius) by itself, because that's what we want! (Something equal to the radius)
C / 2π = r
There's your answer! :)
Answer:
x² + 7x + 12
Step-by-step explanation:
1. (x +3)(x+4) - Distribute
2. x² + 4x +3x + 12 - Add like terms
3. x² +7x + 12
The two ways to find the ratio of the length is to turn the inches into feet or the feet into inches
So the answer can be solved like this:
1/36ft to 1/4ft which is 9:1 (blueprint size to actual size)
or
1/3in to 3in which is also 9:1 (blueprint size to actual size)