3x + 2y = 7
y = x - 4
3x + 2(x - 4) = 7
3x + 2x - 8 = 7
5x = 7 + 8
5x = 15
x = 15/5
x = 3
y = x - 4
y = (3) - 4
y = -1
the solution to the set is (3, -1)
hope this helps :)
Answer:
If a equals 3 then the answer should be 3b
Step-by-step explanation:
x+2 because it just doubles hon so the pattern can actually tell you the expression.
So for example,
if x=2 then 2+2 is 4
if x=4 then 4+4 is 8
and so on and so forth.
I really hope that this makes sense and helped you out in a way hon:)
Answer:
Water (one oxygen atom bonded to two hydrogen atoms)
Step-by-step explanation:
The chemical formula for water is H²O. The H is the chemical symbol for Hydrogen and O is the chemical symbol for Oxygen. The 2 is a subscript which represents how many atoms of a certain element are in a molecule. In this case, the subscript ² comes after H, indicating that there are two Hydrogen atoms inside water. There is no subscript after O, meaning there is only one Oxygen atom. Therefore, there are two Hydrogen atoms and one Oxygen atom that bond to form water. Hope this helps :))
Answer:
Red and Green are parallel
Black and Blue are perpendicular
Step-by-step explanation:
Parallel lines need to have the same slope. Lines red and green both have a slope of 1/2.
The slopes of two lines that are perpendicular have to be opposite reciprocals, and must be multiplied together to get -1. Line black has a slope of -4, and line blue has a slope of 1/4. Both of them multiplied together equals -1.
