algebra questions

please look at the files attached and complete questions 1-15

Perform the indicated operation.
1) g(n) = 4n – 2
h(n)= n² + 1
Find (9)
2) f(t)=-3t+3
g(t) = x3 – 2
Find (f ·g)(1)
3) h(t) = 2t+4
g(t) = 2t
Find (h+g)(-9)
4) f(n)=-
= -n + 5
g(n) = 4n +4
Find (5 f – 4g)(-5)
5) h(a)= 2a – 1
gla)= a
Find (hog)(10)
= a – 4
Solve each system by graphing.
6) 8 = -2y + x
2 = y + x
7) 5x + 4 =-y
0 = 3 y – 12 – 9x
y
AY
6) 8=-2 y + x
2 = y + x
7) 5x +4=-y
0 = 3y – 12 – 9x
y
Ay
5 4
-3
-2 -1
x
5 4 3
-12
-1
2
x
-1
Solve each system by substitution.
8) y=-6x – 12
9) -11x – 2y=-14
y=-11x + 18
y = 6x
10) x + y=-8
2x – 2y = 8
Solve each system by elimination.
11) -10x – 50 =- =-26 y
1 1
0=-1+-y –X
59
12) 3y = 9x + 9
0 = -3y + 9 + 7 x
13) 9 – 9x +9y = 0
14
6
-X = 2 +
-Y
33
14) Amanda and Eduardo are selling wrapping paper for a school fundraiser. Customers can buy rolls of
plain wrapping paper and rolls of shiny wrapping paper. Amanda sold 7 rolls of plain wrapping
paper and 7 rolls of shiny wrapping paper for a total of $210. Eduardo sold 7 rolls of plain wrapping
paper and 9 rolls of shiny wrapping paper for a total of $240. What is the cost each of one roll of
plain wrapping paper and one roll of shiny wrapping paper?
15) The school that Mei goes to is selling tickets to a play. On the first day of ticket sales the school sold
9 adult tickets and 8 child tickets for a total of $170. The school took in $160 on the second day by
selling 2 adult tickets and 14 child tickets. What is the price each of one adult ticket and one child
ticket?