A right angle triangle has sides of lengths (x+5)cm, (x-3) and 9cm

I'm assuming that 9cm is the hypotenuse

of the triangle.

By using Pythagorean's theorem

a²+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)

Step-by-step explanation:

CarryOnLerning

MarkAsBrainliest

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.