Answer: y = 4x + 20
Step-by-step explanation:
4x - y = -20
=> -y = -4x - 20
=> y = 4x + 20
Answer:
1.
$.33
$3
2.
all the answers can be found when the rate is known which is
grapes are sold at $3 per pound
Step-by-step explanation:
$6 ÷ 2 pounds = $3 per 1 pound
this means 1 pound of grapes is $3
next row
1 ÷ 3 = $.33
3rd row
1 multiplied by 3 = $3
2.
all the answers can be found when the rate is known which is
grapes are sold at $3 per pound
Do they know how to divide?
If so, tell them to divide the number in as many ways until you go past the number
For example, if your seeing if 9 is a prime number divide 9 by ,1,2,3,4,5,6,7,8,9 and only count the whole numbers.
This sounds complicated so just teach them simple time tables
One meaning of a 'linear' equation is that if you draw the graph
of the equation, the graph will be a straight line.
That's an easy way to test the equation . . . find 3 points on the
graph, and see whether they're all in a straight line.
This equation is y = 4 / x .
To find a point on the graph, just pick any number for 'x',
and figure out the value of 'y' that goes with it.
Do that 3 times, and you've got 3 points on the graph.
Here ... I'll do 3 quick points:
Point-A: x = 1 y = 4 / 1 = 4
Point-B: x = 2 y = 4 / 2 = 2
Point-C: x = 4 y = 4 / 4 = 1
Look at this:
Slope of the line from point-A to point-B
= (change in 'y') / (change in 'x') = -2 .
Slope of the line from point-B to point-C
= (change in 'y') / (change in 'x') = -1/2 .
The two pieces of line from A-B and from B-C don't even have
the same slope, so they're not pieces of the same straight line !
So my points A, B, and C are NOT in a straight line.
So the equation is NOT linear.
Try it again with three points of your own.
Answer: x=3
I got to the answer by doing simple math. Both sides must be even.
5x-4
5(3)-4= 15-4 = 11
x+8
3+8= 11
So x=3
