Y=-3x+23
distribute -3, get y alone (add 2 to both sides)
It is a quadratic
where x-8 is the squared term
do
x-8=u
u^2-13u+30=0
solve
u=
u=
u=
u=
u=
u=
or u=
u=10 or 3
10=x-8 or 3=x-8
18=x or 11=x
x=11 and/or 18
Answer:
The cost of 7 pens is RS 70
Step-by-step explanation:
Let c=the cost of one book and p=the cost of one pen
5b+4p=115
b=15
5(15)+4p=115
75+4p=115
4p=115-75
4p=40
p=40/4
p=10
7p=7*10
7p=70
The cost of 7 pens is RS 70
"every dollar" means P = 1
compounded monthly interest means 12
1(1+(.129/12)^(12(1)) =
in calculator do pemdas
1. .129/12 = 0.01075
2. 0.01075 + 1 = 1.01075
3. (1.01075)^12 = 1.136907156 =
answer = 1.14
Mayfield schools
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