From the first equation we get
y=4x-15
put the value of y in the second equation
3x+2(4x-15)= -8
3x+8x-30= -8
11x=22
x=2
now put x=2 in any one eqn , say in first
4(2)-y=15
8-y=15
-y=7
y=-7
hope you understand!
Certin, because they can be any two cards.
Answer:
In a short way answer, it will be 8 miles per hour
Answer:
Area of the smaller square is x * x, which is x^2
Area of the larger square is (x + 7)(x + 7), which is x^2 + 14x + 49
The area of the shaded area = Area of the larger square - Area of the smaller square
Area of the shaded region = x^2 + 14x + 49 - x^2
Area of the shaded region is 14x + 49.