Samuel has 25 coins in his collection which is 4 more than three times the amount that Elizabeth has. How
many coins does Elizabeth have?

7

Step-by-step explanation:

7×3=21 (three times the amount)

21+4= 25 (4 more)

25 is the amount of coins that Samuel has. This means that Elizabeth must have 7 coins. This fits the information given.

7 coins

Step-by-step explanation:

samuel has 25 , if you multiply the amount elizabeth has by three and add 4 you will get samuels amount so you minus 4 from 25 which is 21 then you divide 21 by 3 which is 7

answer: i don't understand. what are the options

step-by-step explanation:

hello from mrbilldoesmath!

answer:   (7x + 6y) ( 49x^2 - 42xy + 36y^2)

discussion:

in general, the factorization of a^3 + b^3 is

a^3 + b^ 3 = (a + b) ( a^2 - ab + b^2)

in our case note that 343 = 7^3 and 216 = 6^3 so the equation becomes:

343x^3 + 216y^3 = (7x)^3 + (6y)^3

if you think of a (above) as 7x and b as 6y the factorization becomes

343x^3 + 216y^3 =

((7x + 6y) (   (7x)^2 - 7x*6y + (6y)^2)   =

(7x + 6y) ( 49x^2 - 42xy + 36y^2)

you,

mrb

(a + b) (a^2 - a b + b^2)