select the ordered pairs that are on the y-axis. choose all that apply.
(0, 0)
(0, 1)
(1, 0)
(1, 1)

The ordered pairs that are on the y-axis are: (0,0) and (0,1).

Step-by-step explanation:

First: Review some basic stuff:

To find out when a coordinate pair is on the y-axis, we need to look at the x position of the coordinate. The x-coordinate has to be 0. The x on a coordinate grid controls the how much to the left or right a point on the grid is. If the x-coordinate is 0, it is not to the left or right of the axis that meets it at the point 0, 0 (which is the y-axis). That is why the x-coordinate has to be 0 in order for a point on the grid to be smack down on the y-axis.

Second: Find out the coordinate pairs that have a x-coordinate of 0.

But that brings up a question: Which one is the x-coordinate? Is it the first or the second? Well, when we're dealing with coordinate pairs, the x-coordinate is always first, and the y-coordinate always second (x, y). So we should look for a zero for in the numbers before the comma. The first two have 0 before the comma, so they will be the ones we'll select.

So, the ordered pairs that are on the y-axis are: (0,0) and (0,1).

Topic: The Coordinate Plane

ghjmutmum

step-by-step explanation:

delaney would like to make a 5lb nut mixture that is 60% peanuts and 40% almonds.

she has several pounds of peanuts and several pounds of a mixture that is 20% peanuts and 80% almonds.

let 'p' represent the number of pounds of peanuts needed to make the new mixture, and  

let 'm' represent the number of pounds of the 80% almond-20% peanut mixture.

:

p + m = 5

therefore

m = (5-p)

write an equation based on the percent of peanuts

1p + .2m = .6(5)

replace m with (5-p)

p + .2(5-p) = .6(5)

p + 1 - .2p = 3

p - .2p = 3 - 1

.8p = 2

p = 2/.8

p = 2.5 lbs of peanuts required

then

5 - 2.5 = 2.5 lbs of the peanut/almond mixture required

:

a) what is the system that models this situation?

p + m = 5

1p + .2m = .6(5)