start with what you know: x + y = 35 x - y = 9 add them together: x + x + y - y = 35 + 9 resolve the rest of the facts: X + X = 44 X = 22 22 + y = 35 22 + y - 22 = 35 - 22 y = 13 confirm: 22 + 13 = 35 22 - 13 = 9
-30
y = 6x2 + x -1 ?? discriminant = b2 - 4ac = 12 - 4(6)(-1) = 25
x = 10, y = 25
If you mean: y = 6x+4 then the slope is 6 and the y intercept is 4
y = -5x2 - x + 9
It is an algebraic expression in the two variables, x and y.
y=24
start with what you know: x + y = 35 x - y = 9 add them together: x + x + y - y = 35 + 9 resolve the rest of the facts: X + X = 44 X = 22 22 + y = 35 22 + y - 22 = 35 - 22 y = 13 confirm: 22 + 13 = 35 22 - 13 = 9
-30
If you mean: y = 6x+11 and y = 2x+7 Then by substitution: x = -1 and y = 5
y = 6x2 + x -1 ?? discriminant = b2 - 4ac = 12 - 4(6)(-1) = 25
x = 10, y = 25
65+35=100. 65-35=30.
y+3y-11=24 4y-11=24 4y=35 y=35/4 x=61/4
If you mean: y = 6x+4 then the slope is 6 and the y intercept is 4
x+y=35 x-y=7 ______ 2x=42 x=21 21+y=35 y= 14 (14, 21)