Mth133 Unit 1

In: Computers and Technology

Submitted By imadreamer1226
Words 368
Pages 2
Student Answer form Unit 1

1.

a. (0,41000) (2,46000)

b. slope is m= (y2-y1) / (x2-x1)

m= (46000-41000) / (2-0) m= 5000/2
M=2500

c. y=mx+b

y = 2500x + 41000

d. For 2008 (year 0 was 2002), x will be 6.

Y = 2500(6) + 41000
Y = 15000+41000
Y = 56,000.
Bobs salary in 2008 is $56,000.

e.

68500 = 2500(x) + 41000
27500 = 2500(x)
X = 11
It will take Bob 11 years to reach $68,500.

2. (Notes for myself) L+3=W, W, L+3=W,W

a. 2w+2w+ (3x2) = 78 4w+6=78 4w=72 W=18

b. As shown above, if the w=18 then: W=18 L=21

L= W+3

c. L=21 W= (21/3)+4 W=11 2L+2W=P 42+22=P P=64

If the last length (L) was 21 inches, then the new width (W) would be 1/3 of the L, plus 4 which gives you 11. Thus gives you the L as 21 and the W as 11, using the equation 2L+2W=P, the perimeter is 64 inches.

3.

a. C = 35+4x C = 6.50(x)

b. 35+4x < 6.5x 35< 2.5x 14< x

c. The means that to rent the court so that the monthly cost of the first option is less than the second option, which the court must be rented for MORE than 14 hours.

4.

a. Values according to equation: y = 4x – 3

X = -1 y = 4(-1) – 3 y =-4 – 3 y = -7

X = 1 y = 4(1) - 3 y = 4 - 3 y = 1

X = 3 y = 4(3) - 3 y = 12 - 3 y = 9

b. [pic]

c. Solving for -2x – y = 1 X=-1 -2(-1)-y=1 2-y=1 2=1+y 1=y X=0 -2(0)-y=1 0-y=1 Y=-1

X=1 -2(1)-y=1 -2-y=1 -2=1+y Y=-3

X=2 -2(2)-y=1 -4-y=1 Y=-5

X=3 -2(3)-y=1 -6-y=1 Y=-7

X=4 -2(4)-y=1 -8-y=1 Y=-9

d. .…...

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