Answer:
L = 70 W = 40
Step-by-step explanation:
P = 220 ft
W = L - 30
I started guessing numbers for L that would work. When I did this, I made sure that all of the sides added up to 220 ft.
M=f(g)=30 x g
Think about it - if the car has 5 gallons of gas then
m=f(5)=30 x 5
m=150
The best way to multiply complicated problems mentally* is to break them into chunks.
Start with 20 times 8 to get 160, and then 8 times 5 to get 40. Add these together to get 200. 200 times 3 is 600, and 20 times 200 is 4000. Add these together to get your final answer, 4600.
In other words 8 x 20 + 8 x 5 = 200 200 x 3 + 200 x 20 = 4600
*I assumed you meant mentally, because otherwise you'd just multiply longhand, multiplying two of the three numbers and then multiplying their product with the third.
<span>0.1428571428 would be the correct answer</span>
Y greater than or equal to -7
