You have to add like terms
5x^2 -8xy+15y^2
The sum of numbers or expression involves adding the expressions and the numbers together.
Assume that the sum of the degrees is given as:

The above sum can be rewritten as:

Take the sum of all the numbers (including -2 in bracket)

If the sum of the degrees is given as
, then the number of years he worked would be 6
Read more about sum at:
brainly.com/question/11562149
No.
The perimeter is the distance all the way around the triangle.
So it's the sum of the lengths of the three sides.
The sum of three numbers doesn't depend on what order you
add them ... I think that's the 'commutative' property of addition.
So it doesn't matter which side you start with, or even what order
the sides are arranged in. The perimeter is always the same.
Answer:
1: A) 12 meters
2: B) 225 = (12 + x)(14 + x)
Step-by-step explanation:
42 times 2 = 84
84/12 = 7
(To check) 12 - 7 = 5
I'll be expecting that brainliest :)
Answer:
Trey's rectangular prism will require more material to construct.
Explanation:
Trey's rectangular prism's surface area is more than Matt's rectangular prism's surface area.