Answer:
B
Step-by-step explanation:
x+y=4
-x+y=2
We solved this equations system by reduction method:
x+y=4
-x+y=2
-----------------
2y=6 ⇒y=6/2=3
x+y=4
-(-x+y=2)
---------------
2x=2 ⇒x=2/2=1
answer: x=1; y=3
substitution method
x+y=4
-x+y=2
x=4-y
-(4-y)+y=2
-4+2y=2
2y=2+4
2y=6
y=6/2=3; then x=4-y=4-3=1
answer: x=1; y =3
equalization method
x+y=4 ⇒y=4-x
-x+y=2 ⇒y=2+x
Therefore:
4-x=2+x
-x-x=2-4
-2x=-2
x=-2/-2=1; then; y=4-x=4-1=3
Answer: x=1; y=3.
Answer:
• new garden area = 2x^2
• new side length = 8√2 ft
Step-by-step explanation:
We are given that the area of a square of side x is ...
A = x^2
We want to double that area, so we can multiply by 2:
2A = 2x^2
___
The original formula tells us that the side length x is the square root of the area:
√A = x . . . . . square root of original formula
Then the side length of the square with doubled area will be
new side length = √(new area) = √(2x^2) = x√2
For an original side length of 8 ft, the new side length will be ...
new side length = (8 ft)√2 = 8√2 ft.
Answer: B. p=8.00h
Reason: Because if we use 4 hours for example, it will be p= 8 x 4
and 8x4 is 32
Do them backwards and you will get the answer