Triangle is attached below
The triangle is 12 by 10 by 8
Perimeter:
To find perimeter we add all the sides of the triangle
Perimeter P = 12 + 10 + 8 = 30 units
Semi perimeter:
Semi perimeter is half of its perimeter
We know P = 30
Semi perimeter s=
=
= 15 units
Area:
If we know the sides of the triangle then we use Heron's formula to find the area of the triangle

Where s= semi perimeter
a,b,c are the sides of the triangle
s= 15 units
a= 12 units
b= 10 units
c= 8 units




A= 39.7 square units
Answer:
For question 9, the answer is B. This is because for first step, she should have done:
8(n+20) = (8*n) + (8*20)
Step-by-step explanation:
Answer:
30 $ is 50 % of 60$
Step-by-step explanation:
The original price is 60$
The sell price 50% of the initial price
so we state that:
- 60$⇒ 100%
- x(the sell price)⇒ 50%
- x =
= 30$
Answer:
Elsa - 17 orders
Deon - 22 orders
Carlos - 68 orders
Step-by-step explanation:
You need to set variables and create system of equations first.
Elsa= e
Deon= d
Carlos = c
e+d+c=107
d=e+5
c=4e
Now you plug in the values into the equation x+y+z=116
e+(e+5)+(4e)=107
6e+5=107
6e=102
e=17
You plug in the value of x into the other equations.
e = 17
d= 17+5=22
c=4*(17)=68
Rearrange so it corresponds with days...
Elsa - 17 orders
Deon - 22 orders
Carlos - 68 orders