Answer:
The dimensions are 4 millimetres by 10 millimetres
Step-by-step explanation:
The area of the first rectangle is 5*8=40 square millimetres. Let's call the width of they yellow rectangle w, and the length l. Now you can set up the following system of equations:
l*w=40
2l+2w=28
Isolate one of the variables to substitute:
l=40/w
2(40/w)+2w=28
80/w+2w=28
Multiply both sides by w:
80+2w^2=28w
Move everything to one side:
2w^2-28w+80=0
Factor the quadratic:
2(w^2-14w+40)=0
2(w-10)(w-4)=0
w=4 or 10
l= 10 or 4
Hope this helps!
Hmm,
the absolute value makes whaterver inside positive
so
find whre the abslte value is 0
1.6x-2=0
1.6x=2
x=2/1.6
x=1.25
as x approaches 1.25, the function decreases
so from left to right
from the left to right, from -ifninty to 1.25, it is decreasing
from 1.25 to infinity, it is increasing
so it is increasing in the interval (1.25,∞)
Answer:
$60,000
Step-by-step explanation:
20,000×3=60,000
Just one. the solution is 11/3
Ratio problem
1 cm = 120 km
------- = --------
x 463
120x = 463
x = 23.15 = 23.2
