That is correct.. (-4)(-1)=4 4(3)=12 12(-2)=-24
Answer
$168.75
Step-by-step explanation:
$22.50 per hour meaning every hour she gets 22.50
half an hour would be half the money so
22.50 * 7 = 157.50
22.50/2 = 11.25
157.50 + 11.25 = 168.75
168.75 is the answer
Answer:
625 ft^2
Step-by-step explanation:
Given
--- perimeter
Required
The largest area
The perimeter is calculated as:

So, we have:

Divide both sides by 2

Make L the subject

The area is calculated as:

Substitute 

Open bracket

Differentiate with respect to W

Set to 0; to get the maximum value of W

Collect like terms

Divide by -2

So, the maximum area is:



