Create a model to help you solve this. Field Engineers are putting down the turf for 8 days.
Day 1: 30
1 of the whole field is put down
Day 2: 30
2 of the whole field is put down
Day 3: 5
1 of the whole field is put down
Day 4: 10
3 of the whole field is put down
Have the Engineers covered ½ of the field yet? How do you know?

it is probably the graph on the bottom right.

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared

4444444444444 i think

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.