Answer:
Step-by-step explanation:
9514 1404 393
Answer:
y = -1/2x +11/2
Step-by-step explanation:
The slope of the line is ...
m = (y2 -y1)/(x2 -x1)
m = (1 -2)/(9 -7) = -1/2
The y-intercept is ...
b = y -mx
b = 2 -(-1/2)(7) = 11/2
Then the slope-intercept equation is ...
y = -1/2x +11/2
_____
<em>Alternative solution</em>
A general form equation for the line can be ...
(y1 -y2)(x -x1) -(x1 -x2)(y -y1) = 0
(2 -1)(x -7) -(7 -9)(y -2) = 0
x-7 +2y -4 = 0
x +2y -11 = 0 . . . . . general form equation
x +2y = 11 . . . . . . . standard form equation
Note that we want the x-coefficient to be positive, so we chose the order of the points to make that be the case.
Answer:
3x + 4
Step-by-step explanation:
First we want to remove the parentheses so
4x + 3 - (x-1)
4x + 3 -x +1 The signs changed because of the negative sign that was distributed in the parentheses
now arrange them
4x - x + 3 + 1
Now solve
4x - x = 3x
3 + 1 = 4
The answer is 3x + 4
Hope this helps :)
Answer:
There are 10 in 4kg
Step-by-step explanation:
Given

Required
Determine the number in 4kg
Represent this with x.
To calculate this, we make use of the following:

Multiply through by 



<em>Hence, there are 10 in 4kg</em>