Answer:
38
Step-by-step explanation:
90-52=38
First we need to find the slope:
Slope formula=
Plug in your given values from the coordinate
Slope =
When we have 2 "-"'s together they turn into a + sign so we add.
Slope =
Slope =
Simplify (in this case divide) the slope:
Slope =
slope-intercept form is:
y=mx+b
Where m=slope
b=y-intercept
So far we have:
y=2x+b
To find b all we have to do is pick any given coordinate and plug it in:
I chose (3,1)
so we plug that in the equation
1=6+b
Now solve for b:
1=6+b
subtract 6 from both sides
b=-5
Final answer:
y=2x-5 (D)
Answer:
y = -7
Step-by-step explanation:
Answer:
It equals 256 because 2x2x2x2x2x2x2x2= 256
Answer:
4KO2 + 2CO2 → 2K2CO3 + 3O2
Step-by-step explanation:
First we write the reaction in the asked form :
x1 KO2 + x2 CO2 → x3 K2CO3 + x4 O2
In a chemical equation, tha amount of substance that react is the same amount that is formed :
On each side of the equation we must have the same amount of K,C and O.
Let's write this in equations :
K balance :
C balance :
O balance :
The linear equations system is :
Let's equal to 0 to obtain a homogeneous equations system (for convenience) :
Let's work with the extended system matrix :
Working with the matrix :
→
→
→
→
→
The matrix is extended to the following linear system :
t∈ IR
Let's choose t=3 to eliminate the fractional numbers →