Proszę o pomoc ! Pilne !
a)7a+3b+4c+5a-2b-8c
b)2a-4b-5c-6a-3b+2c
c)4a-2b+3-3a+6b-9
d)-4a+5b-7-2a-3b+3
e)3x+5y-4x+6y-7x-9y
f)-5x+2y-4x+5y+6x-3y
g)-2x+3y+3-2y-3x-4+y-4x+2
h)x-2y-4-2x-5+y-3+2x-6y
i)212x-323y-223y-5x+a-13
j) 4,5ab+212ba-527abc-312ba+37cab+acb- abd

Atriangle includes one angle that 72º. which pair could be the measures of the other two angles of the triangle? a. 9º, 9º b. 26º, 46º c. 53º, 55º d. 72º, 108º

Cameron indoor stadium at duke university is one of the most revered sites in all of college basketball, as well as in all of sports period. duke’s men’s and women’s basketball programs have attained quite a few wins in the building over the last seventy years. cameron indoor stadium is capable of seating 9,460 people. for each game, the amount of money that the duke blue devils’ athletic program brings in as revenue is a function of the number of people in attendance. if each ticket costs $45.50, find the domain and range of this function.

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.