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Q: The sum of xy times 3?

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Yes, xy is the same as yx, but should always be written as xy.

Area of a trapezoid = 0.5*(sum of parallel sides)*height

3x+5x

Improved Answer:If: x = -2 and y = -4Then: xy = 8Because: -2 times -4 = 8

It depends on where arc XY is: on a circles, a parabola or some other curve; and what else you know about the curve.

Related questions

Suppose the numbers are x and y. The sum of their reciprocals = 1/x + 1/y = y/xy + x/xy = (y+x)/xy = (x+y)/xy = 10/30 = 1/3

Suppose the two numbers are x and y. Then, the sum of THEIR reciprocals is 1/x + 1/y = y/xy + x/xy = (y + x)/xy = 7/25

the sum of 3 times m and n

Suppose the numbers are x and y Then the sum of their reciprocals is 1/x + 1/y = y/xy + x/xy = (y+x)/xy = 10/20 = 1/2

xy/-3

1/x+1/y y/xy+x/xy x+y/xy=12/24 12/24=1/2 1/2 is the answer.

7+xy

(x+y+z)*3= Using the 'Order of Operation' rules, the addition within brackets is done first, then the sum is multiplied by 3 (thrice means three).

1/x + 1/y y/xy + x/xy (y+x)/xy= 10/20 10/20=1/2 1/2 is the answer.

(a + b)/(xy)

1/x + 1/y = (y+x)/xy But y + x = sum = 150, and xy = product = 40 So sum of reciprocals = 150/40 = 3.75

The sum of x and y decreased by their product is (x + y)- xy.