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Answer:
25x² − 20x + 4
Explanation:
(5x − 2)²
= (5x + −2)(5x + −2)
= (5x)(5x) + (5x)(−2) + (−2)(5x) + (−2)(−2)
= 25x² − 10x − 10x + 4
= 25x² − 20x + 4
Answer:
A. 16, B.32
Step-by-step explanation:
A.
We will say that
is the total capacity of the tank.
Since 12 gallons of water fill the tank to 3/4 capacity, we know that 12 gallons is 3/4 of the total capacity. Hence,
.
The last equation tells us that
.
B.
We will say that D is the number of half-gallon bottles that can be filled with the water of the tanke, note that D times 1/2 must be the total capacity of the tank. Hence,
and so, we get that 
Suppose the width is w
Then the length will be w+4
Perimeter will be 2 (length + width) = 2 (w + w + 4 ) = 60
Solve this for w. Knowing w you can find the length and width.