10 kg de apa rece cu temperatura de 20°C si se adauga apa fierbinte la temperatura de 60°C pentru a avea o temperatura finala a apei din vas la 30°C. Stiind ca : caldura specifica a apei este c a = 4180 J/kgK si capacitatea calorica a vasului este C vas = 1000 J?K, calculati cantitatea de apa fierbinte care trebuie adaugata.

hi,

6x times 4 is 24x and 5 times 4 is 20, so the answer is 24x+20.

hope this and for a little humor i am groot.

its a straight line parallel to the time axis

2 equivalent expressions to represent the area of a rectangle and the top is n-3 and the side is 2

area of the rectangle = length * width

given length = n - 3

width = 2

replace it in the area

so area of the rectangle = (n-3) *2

= 2(n-3)

one of the expression is 2(n-3)

to get another expression we distribute 2 inside the parenthesis

2(n-3) is 2n - 6

so another expression is 2n - 6

two equivalent expression are

2(n - 3)   , 2n - 6