I did my best to explain it on graph paper. I hope this helps! Look at the attached picture.
Answer:
-14w²-7w+1
Step-by-step explanation:
(–7w2 – 2w – 1) – (–5w2 + 3w – 2)
-14w²-2w-2w-1 +10w²-3w+2
combine the like terms
-14w² + 10w² - 2w-2w-3w+2-1
-4w²-7w+1
Smaller leg = x
longer leg = y
hypotenuse = z
y=x+7
z=x+8
due to

but x cannot be -3
so smaller leg is 5 inches
then longer leg = 5+7 = 12 inches
and hypotenuse = 5+8 = 13 inches
I believe she is ten because if last year Ellen was twice Maja's age that would be 11 minus one because it was last year. So 10 years older now so whats ten doubled because she was twice her age so 10+10=20. So now we know Maja is 10 and Ellen is 21.