Efectúa las siguientes sumas y restas de expresiones algebraicas
1. 6a²+8ab-3b+4a2-5+7b=
2. 5xy+2y +4x-1-6x+4xy+2y2-3=
3. 6xy+8x-1y+3x-7y+4xy-5xy+2y-6x=
4. 4+2x²y +6y2+7x+9-6x+4x?y?+2y2-3=
5. 3aw-7xy -10aw+15xy =

answer: what is the conflict?

step-by-step explanation:

*what has happened to new york city?

*what is in the time capsule?

* what did the kidz see that gave them hope?

*what will they do with what they find?

* how will they save the city?

* what challenges will they face along the way?

*what big choice will they make at the climax of the story?

* what lesson do they learn at the end of the story?

d

because parallelagram have all 4 angels the same size dependeing and a rectangle and square are oth parallelogram

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."

f(x) is   are being squared

g(x) is   increasing by 2

h(x) is adding .25 each time

k(x) is taking the square root

f(x) and k(x) are exponential functions