Answer:addition property of equality, combine like terms, distributive property and division property of equality.
Step-by-step explanation: I took the test
let's label each pump A, B, and C, just for convenience. A fills the tank by 1/50 every minute, B fills the tank by 1/60 every minute, and C drains it by 1/75 every minute. Now we can put them all into one function: t(1/50 + 1/60 - 1/75) = 1, where t = our time in minutes and 1 = the tank being full.
next, we solve for t: t = 300/7 minutes, or approximately 42.86 minutes.
Answer:
2,3 ( x - 2, y - 3 )
Step-by-step explanation:
you have to substract x - y
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Answer:
x = (1 ±√97)/4 ≈ {-2.21221, 2.71221}
Step-by-step explanation:
Multiply the equation by 12x to clear fractions.
12 = 2x^2 -x
6 = x^2 -1/2x . . . . . . divide by 2
6 +1/16 = x^2 -1/2x +1/16 = (x -1/4)^2 . . . . . add 1/16 to complete the square
±√(97/16) +1/4 = x . . . . . . square root and add 1/4
x = (1 ±√97)/4
x ≈ -2.21221, 2.71221