The solutions of the equation 3x - y = 1 are (-2,-7),(-1,-4) and (3,8) thus option (A),(B) and (D) are correct.
<h3>What is the equation?</h3>
There are many different ways to define an equation. The definition of an equation in algebra is a mathematical statement that demonstrates the equality of 2 mathematical expressions.
In another word, the equation must be constrained with some constraints.
As per the given equation,
3x - y = 1
Substitute, x = -2
3(-2) - y = 1
y = -7 thus (-2,-7) satisfied.
Similarly (-1,-4) and (3,8) are also satisfied.
Hence "The solutions of the equation 3x - y = 1 are (-2,-7),(-1,-4) and (3,8)".
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Rotation about the origin
When simplified, y=2(x+4)+5 equals y=2x+13
Answer:
Elgas is 9 years old.
Step-by-step explanation:
Alvin: 3 x Elgas
36: Alvin + Elgas
36 / 4 : 9
Elgas: 9
Alvin: 27
To check: 27 + 9= 36
Answer:
area of the figure A is 7.5m^2
Step-by-step explanation:
figure A is the combination of rectangle and triangle.
so
area of figure A = area of triangle + area of rectangle
= 1/2 X b X h + L X b
= 1/2 X 1 X (1+1+1) + (1+1+1) X (1+1)
= 0.5 X 1 X 3 + 3 X 2
= 1.5 + 6
= 7.5 m^2
