Write a system of inequalities whose solution set is the region shown.
A. y ? 2x + 4
y ? 
x + 2
B. y ? -2x + 4
y ? - 
x + 2
C. y ? -2x + 4
y ? - x + 2
D. y ? 2x + 4
y ? 
x + 2
Answer: B
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Identify the type of surface represented by the given equation. 
+ 
= 
A. Hyperbolic paraboloid
B. Elliptical cone
C. Elliptical paraboloid
D.
| Ellipsoid |
Rewrite the expression as the sum and/or difference of logarithms, without using exponents. Simplify if possible.logn
A. 
logn6 + 
lognx - 
lognz
B. 
logn6 + 5 lognx - 9 lognz
C. 
logn6 + 
lognx + 
lognz
D. 
logn6 - 
lognx - 
lognz
Conduct a survey to determine the major worry of school teachers. ?
A. 1. Do you sometimes feel worry?2. When do you usually feel worry?3. What usually appears to be a reason of these feelings?? B. 1. Do you have a pet?2. What is it?3. What is it's name?? C. 1. Do you use the internet ?2. Do you find it expensive?3. Where do you usually use the internet?? D. 1. Where do you usually buy food?2. How often do you visit big supermarkets?3. What is the mean price of your purchase?? E. 1. Do you entrust to your president?2. Did you vote for him (her)?3. Can you name his decision, that you don't appreciate??
Factor by grouping.x3 + 4x + x2 + 4
A. (x2 + 1)(4x + 1) B. (x2 + 4)(x + 1) C. (x2 + 1)(x + 4) D. (4x + 1)(x + 1)