MATH133_U1_answer

MATH133_U1_answer - -15x+210=0-15x= -210-15x/-15 = -210/...

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Student Answer Form Unit 1 March 23, 2011 1. a. (1.0, 228,000) (2.0, 216,000) b . m=(y2-y1) / (x2-x1) m= (216,000-228,000) / (2.0-1.0) m= -12,000 / 1 m= -12,000 c. Y=(-12,000) * x + b (228,000)= (-12,000) * (1) + b (-12,000) * (1) + b = (228,000) B – 240,000 = 216,000 B= 240,000 Y= -12, 000x + 240,000 (1.0, 228, 000)= Y= -12,000x + 240,000 y= (-12,000) * x + b y= (216,000) = (-12,000) * (2) +b (-12,000) * (2) + b = 216,000 B – 240,000 = 216, 000 B= 240,000 Y= -12000x + 240,000 (2.0, 216,000) = y = - 12,000 x + 240,000 d. y= - 12,000 +240, 000 * (8) y= - 12, 000 + 192, 000 y= 180, 000 e. y= 240,000 / 48, 000 y= 5 2.
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a. 2L=50 2L/ 2 = 50/2 L= 50/2 L= 25 b. p= (2) 25+2 W 2*25+2W=50 50+2W=50 2W= -50 +50 2W= 0 2W/2 = 0/2 W=0 c. P= 2 * 25 + 2.0 P=50+2.0 P= 50 + 0 P=0 3. a. Option 1: C= 210 + 10x Option 2: C=25x b. option 2 > option 1 25x > 10x + 210 10x + 210 – 25x=0
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Unformatted text preview: -15x+210=0-15x= -210-15x/-15 = -210/ -15 X= - 210/ -15 X= 14 c. Less than 14 in for option 2 is less expensive More than 14 in for option 1 is less expensive C= 210 + 10 (14) and C= 25 (14) 4. a. X Y-1 9 7 2 3 4-1 Y= -2(-1) +7 y=2+7 Y=9 Y= -2(0) +7 y=0+7 Y=7 Y= -2(2) + 7 y= -4+7 Y=3 Y=-2(4) + 7 y= -8+7 Y= -1 b. c. X Y-8 1-5 2-2 3 1 4 4 3(0) 4 =8 --> 0 y =8 --> - y=8 --> -y * -- 1 = 8 * -- 7-> Y= -8 3(1) 4 =8 --> 3- y = 8--> - y= - 3+8--> -y=5--> -y * - 1 5 * 1 --> y=5* - 1-->y= -5 3(2) -4=8 -->6-y=8--> -y= -6 +8--> -y=2 -->-y*1=2* -1 -->y=2*-1 -->y= -2 3(3)-4=8-->9-y=8-->-y=9+8--> -y= -1-->-y* -1 = - 1*-1 -->y= - 1 * -1 > y = 1 3(4)-4=8 --> 12 y = 8 --> - y = - 12+8 --> - y -12 + 8 --> y = 4 d....
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MATH133_U1_answer - -15x+210=0-15x= -210-15x/-15 = -210/...

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