8-15/y
7 and 8Since:x+y=15 or x=15-yxy=56so that y(15-y)=5615y-y2=56y2-15y+56=0(y-7)(y-8)=0which makes y=8 or y=7
y = slope × x + intercept → y = -0.5x + 15 → y = -0.5 × 8 + 15 = -4 + 15 = 11
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x=4 y=1
8-15/y
-1+y/8
y-7=8 (original equation) y=8+7 (add 7 to the opposite side) y=15 (combine like terms) y=15 (final answer)
7 and 8Since:x+y=15 or x=15-yxy=56so that y(15-y)=5615y-y2=56y2-15y+56=0(y-7)(y-8)=0which makes y=8 or y=7
-15
y-7=8 (original equation) y=8+7 (add 7 to the opposite side) y=15 (combine like terms) y=15 (final answer)
8 , and 7. x+y=15 >> x=-y+15 x*y=56 >> y*(-y+15)=56 , then solve for y , put y back into either equation for x.
Son las ocho y cuarto. (It is a quarter past 8:00) Son las ocho y quince. (It is 8:15)
If you mean y = 8x+15 then it is a straight line equation whereas 8 is the slope and 15 is the y intercept
Assume that the two numbers are represented by 'x' and 'y': x+y=7 and xy= -120 As x+y=7, re-arrange the formula so that x=7-y Now substitute for x: (7-y)y = -120 7y-y2= -120 7y-y2+120 = 0 y2_7y-120 = 0 (y-15)(y+8) = 0 Therefore y = 15 or -8, and so putting back into the original equation, when y=15, x = -8, and when y= -8, x = 15
y = slope × x + intercept → y = -0.5x + 15 → y = -0.5 × 8 + 15 = -4 + 15 = 11
71