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Earn +20 ptsQ: What is the value of t when 5x equals -2 and 4y equals -4?
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What is 4y - 2 equals 6?
4y -2 = 6 4y = 6 + 2 4y = 8 y = 2
How do you solve 3X plus 2Y equals 16 and 5X plus 3Y-18 equals 4Y by substitution?
First collect like terms in the second equation: 5x - 18 = 4y - 3y ie y = 5x - 18 Substitute this for the term in y in the first equation, getting 3x + 2(5x - 18) = 16 ie 3x + 10x - 36 = 16 ie 13x = 16 + 36 so x = 4 and y = 5 x 4 - 18 ie 2.
What is the value of the expression 5X-2y when x equals 9 and y equals 4?
5X - 2Y X = 9 Y = 4 5(9) - 2(4) 45 - 8 37 is the value
What are the solutions for the equations x equals 4y and 3x-2y equals 20?
x = 4y 3x - 2y = 20 Substituting the value of x into the second equation, 3*(4y) - 2y = 20 ie 12y - 2y = 20 or 10y = 20 so that y = 2 Then x = 4y = 4*2 = 8. So (x , y) = (8 , 2)
What is this quadratic equation written in standard form of x2 - 2 equals -2x2 plus 5x?
It is: 3x2-5x-2 = 0 and the value of x is -1/3 or 2 when solved
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