Doamna invatatoare numeroteaza paginile catalogului. Prima pagina din dreapta este numerotata. cu 1, cataloagul are 24 de foi si o foaie are doua pagini. Care este suma numerelor din primele 4 pagini. Poate exista o foaie cu paginile 12-13?
Care este ultima pagina din catalog
De câte ori s-a folosit cifra 3 în numerotarea catalogului?
Câte pagini sunt numerotate cu doua cifre?
Urgent! Dau coroana

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

the equivalent expression are always the hardest ones but you look at the gcf also

step-by-step explanation:

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.

a

step-by-step explanation: