I’m assuming that 9cm is the hypotenuse of the triangle.
By using Pythagorean’s theorem
α²+b²=c²
in this case, c =9
So, (x+5)² + (x-3)² =(x+5)(x+5) + (x-3)(x-3)
=x²+5x+5x+25+x²-3x-3x+9
=2x²+4x+31=81
And by solving the equation, you get two x values, but since you can’t have x as a negative figure, the positive figure being 3.9498, x=3.95 (corrected to 3 significant figures)
Answer:
E) 4x + 3
F) 8x -1
Step-by-step explanation:
If the equation is a y = mx + b equation then it is linear.
The sum of 0.75 and -2.25 is -1.5. -1.5 is rational
1.
3n + 5 = 6
3n = 6 - 5
3n = 1
n = 1/3
2.
4 + 5x = 1
5x = 1 - 4
5x = -3
x = -3/5
3.
4y - 15 = -10
4y = -10 + 15
4y = 5
y = 5/4
4.
3 - 4d = 13
-4d = 13 - 3
-4d = 10
d = -10/4
d = -5/2
5.
8 = 9x - 7
8 + 7 = 9x
15 = 9x
15/9 = x
5/3 = x
hope this helped, God bless!
