Answer:
y=1 (sorry i dont know what justify means lol, i forgot) i know how to solve the answer lol.
Step-by-step explanation:
10y-15-4y=8-2y-15
10y-4y+2y=8-15+15
8y=8
y=1
Find the difference (subtract) between the accepted value and the experimental value, then divide by the accepted value. To determine if a value is precise find the average of your data, then subtract each measurement from it.
Let 
be the length and 
be the width of the rectangle.
Given perimeter of the rectangle
Area of the rectangle is
Also length is 5 more than twice its width,
From the above equations
Now 
The dimensions of the rectangle are length 
, and width 
.
Sarah's income = Number of trays × Rate per tray
y = 450 × 8
If there is an increase of 0.85 in price,
New price = 8 + 0.85
For x number of increases,
new price = 8 + 0.85x.
Number of trays reduced = 450 - 15x.
So, Sarah's income in this case is y = (450 - 15x) (8 + 0.85x).
1.
a. 8 x 7 x 1/2 = 56 x 1/2 = 28
b. 24 x 14 x 1/2 = 336 x 1/2 = 168
c. 5 x 12 x 1/2 = 60 x 1/2 = 30
d. 4 x 4.8 x 1/2 = 19.2 x 1/2 = 9.6
2.
two triangles: 2(4 x 8 x 1/2) = 4 x 8 = 32
rectangle: 15 x 8 = 120
total area: 32 + 120 = 152
