5. 2.9n+1.7=3.5+2.3n
.6n+1.7=3.5
.6n=1.8
n=3
6. -4-5(x+8)
-4-5x-40
-5x-44
A. $74.55
because if their are 4 pairs you would do 35x4=140 the half of 140 would be 70. Then they would have to pay tax witch is 6.5% of 70 and that is 4.55 so paying for the shoes and including tax would be 74.55
(x-7)(x+12)
X^2 +12x-7x-84
x^2+5x-84. <- answer
Given :
Emily sells erasers for $2 per package and pencils for $5 per package. she sells 220 total packages and earns $695.
To Find :
The number of packages of erasers and pencils that were sold
.
Solution :
Let, number of erasers are x and pencils are y.
So, x + y = 220 ....1
Also, 2x + 5y = 695 ....2
Solving equation 1 and 2, we get :

x = 220 - 85 = 135
Therefore, the number of packages of erasers and pencils that were sold are 135 and 85 respectively.
Hence, this is the required solution.
Answer:
There are 21 seats in one row, and there are 147 seats in 7 rows
Step-by-step explanation:
63÷3=21 / 21×7=147