| answers: d b a c d a c c
a a. On #10, note correction; the answer is a ! |
| These are from sec 2.6
|
| 1. 66(t - 1) > 64(t + 1)
|
| a t
< 60 |
| b
t > 120 |
| c
t > 60 |
| d nota |
| 2. 8 - 8y >
16
|
|
a
y > -1 |
|
b
y < -1 |
|
c y < 1 |
|
d y
> 1 |
| e. nota |
| 3. 8 + 8y
> 16 |
|
a y
> 1 |
|
b y
< -1 |
|
cy < 1 |
|
dy >
-1 |
| e. nota
|
| These are from 2.7
|
| 4. Ryder in Funny Town rents trucks at a
daily rate of $160.00 plus $ 2.00 per mile. A family wants a one
day truck rental. They can spend less than $600.00 within their budget.
What range of mileage will allow them to stay within that budget.
The translation of this problem is :
|
|
a 600.00 + 2.00x
<160.00 |
|
b600.00 =
160.00 + 2.00x |
|
c160.00 + 2.00x
<600.00 |
|
d160.00 + 2.00x
>600.00 |
| e. nota |
| 5. The solution to the previous
problem is: |
|
a x > -220
miles |
|
b x < -220
miles |
|
c x > 220
miles |
|
d x
< 220 miles |
| 6. Area of a rectangle. The width
w is fixed at 4 cm. For what lengths L will the area be less than
32 cm
2 ? |
|
a L < 8 cm |
|
b L < 8 cm2 |
|
c L = 8
cm |
|
dnota |
| These are from 3.1 |
| 7. The birth rate among teenagers. The
birth rate among certain teenagers (measured in births per 1000 females)
fell steadily from 80 in 1992 to 40 in 2002. Estimate the birth rate
among these teenagers in 1997. |
|
a70 |
|
b50 |
|
c60 |
|
dnota |
| 8. In what quadrant is the point (-7,
-8) located ? |
|
aI |
|
bII |
|
cIII |
|
dIV |
| The last probs. are from 3.2. |
| 9. Is (1,-2) a solution of the
equation 4y + 2x = -6 ? |
|
ayes |
|
bno |
|
c |
|
d |
| 10. y = (1/4)x + 2. If y = 0, then |
| ax
= -8
and the point for this solution is (-8,0)----Note correction; the
answer is a ! |
|
bx = -8 and
the point for this solution is (0,-8) |
|
cx = 0 and
the point for this solution is (0,8) |
|
dx = 8 and
the point for this solution is (8,0) |
| 11. Written Problem. Graph this
equation: x - y = 6. |