I think that the answers are 4, 4 and 25 respectively
Answer:
volume=0.000064
mass=0.5888kg
Step-by-step explanation:
Given that the area is equal to twice the perimeter and the dimensions are:
length=4x ft, width=(x+6) ft
the perimeter will be:
P=2(L+W)
P=2(4x+(x+6))
P=2(4x+x+6)
P=2(5x+6)
P=(10x+12)
Area of the rectangle is:
A=4x(x+6)
A=4x²+24x
but:
2P=A
thus
2(10x+12)=4x²+24x
20x+24=4x²+24x
thus
4x²+4x-24=0
x²+x-6=0
x²-2x+3x-6=0
x(x-2)+3(x-2)=0
(x-2)(x+3)=0
thus the answer is:
x=-3 or x=2
thus
length=4x=4*2=8 ft
width=(x+6)=(2+6)=8 ft
Answer:
2x^2
Step-by-step explanation:
hope this helps :)
<em><u>The pair of like terms are:</u></em>

<em><u>Solution:</u></em>
<em><u>Given expression is:</u></em>

We have to find the pairs that are like terms in the given expression
Like terms means that, terms that have same varibale but different ( or same ) coefficients
Here in the given expression "x" and "y" are the two variables present
Arrange the like terms

So here the first two terms has same varibale "y" but different coefficients. So they form a pair of like terms
"x" is present only once . There is no other term with variable "x"
6 and -2 are constants
So the pair of like terms are: 