Answer:
Below
Step-by-step explanation:
All figures are squares. The area of a square is the side times itself
Let A be the area of the big square and A' the area of the small one in all the 5 exercices
51)
● (a) = A - A'
A = c^2 and A' = d^2
● (a) = c^2 - d^2
We can express this expression as a product.
● (b) = (c-d) (c+d)
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52)
● (a) = A-A'
A = (2x)^2 = 4x^2 and A'= y^2
● (a) = 4x^2 - y^2
● (b) = (2x-y) ( 2x+y)
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53)
● (a) = A-A'
A = x^2 and A' = y^2
● (a) = x^2-y^2
● (b) = (x+y) (x-y)
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54)
● (a) = A-A'
A = (5a)^2 = 25a^2 and A' =(2b)^2= 4b^2
● (a) = 25a^2 - 4b^2
● (a) = (5a-2b) (5a+2b)
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55)
● (a) = A - 4A'
A = (3x)^2 = 9x^2 and A'= (2y)^2 = 4y^2
● (a) = 9x^2 - 4 × 4y^2
● (a) = 9x^2 - 16y^2
● (a) = (3x - 4y) (3x + 4y)
Answer:
325
Step-by-step explanation:
300+25=325 I guess ok ok ok
53.65 gallons → B
Since the tanks are equal in size then to find the volume of 1 tank
divide the total by 12
one tank = = 53.65
Answer: 1 1/3
Step-by-step explanation:
Turn 6 2/3 into a improper fraction (20/3)
Subtract 8 - 20/3
Get 4/3 turn 4/3 into a mix number and get 1 1/3
Answer:
x = 125/7 , y = -11/3
Step-by-step explanation:
7x - 9y = 29
7x + 2y = - 15
- - + (subtracting)
__________
0 - 12y = 44
y = 44/-12
y = - 11/3
Putting y in first equation,
7x - 9 (-11/3) = 29,we get
x = 125/7 or 17.8
Hope it helps!