Questões matemáticas 4) 3a- 4b ( 4 - 7a + 2b ) + b 6) 3mn ( m² + n² - m + 4n - 5 ) 8) ( x + √5 )² 9) ( 4x + 2y )² 10) (2w-1,6)² 13) (x+11)(x+18) 15) (x+4,7)(x+3,25) considere x=-4, y=48 e z=2,7 17) 2x-y+3z 18) xz+1,57 20) x³+2x²-4x

susie has 7 apples

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

i'm sorry mate, but i am not seeing any figures. i am unable to solve this for you.