Solve the problem.At a national computer show, two software companies continuously run videos showing their products. Company A's video repeats every 15 minutes, while Company B's video repeats every 21 minutes. If both companies begin the videos at 1:00 P.M. when the show opens, how many minutes will elapse before they are in sync again?
A. 210 min
B. 35 min
C. 70 min
D. 105 min
Answer: D
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Find the equation of the line passing through the indicated two points. Write the equation in point-slope form.
and 
A. y - 
= 7(x - 1) or y - 
= 7(x - 7)
B. y + 
= 
(x + 1) or y + 
= 
(x + 7)
C. y - 
= 
(x - 1) or y - 
= 
(x - 7)
D. y + 
= 7(x + 1) or y + 
= 7(x + 7)
Answer the question.Consider the numbers 0.179173...., 
, -6, 0, 
, 
, 0.
, 0.38, 
. Which are irrational numbers?
A. 0.179173....,
, 0.
, 
B. 
, 
C. 0.179173....,
, 
D. 0.179173....,
, 0.
Solve the problem.The following bar graph shows the average annual income for single mothers.
i) Determine a linear function that can be used to estimate the average yearly income for single mothers from 1995 through 2000. Let t represent the number of years from 1995. (In other words, 1995 corresponds to t = 0, 1996 corresponds to t = 1, and so on.)ii) Using the function from part i, determine the average yearly income for single mothers in 1998.iii) Assuming this trend continues, determine the average yearly income for single mothers in 2010.iv) Assuming this trend continues, in which year will the average yearly income for single mothers reach
$33,000? A.
| i) | I(t) = 775.8t + 24,269 |
iii) $35,906.00
iv) 2006
B.
| i) | I(t) = 775.8t + 24,269 |
iii) $35,906.00
iv) 2007
C.
| i) | I(t) = 775.8t + 24,269 |
iii) $35,906.00
iv) 2006
D.
| i) | I(t) = 770.8t + 24,269 |
iii) $35,831.00
iv) 2006
Use the given information to write an equation. Let x represent the number described in the exercise. Then solve the equation and find the number.Four times a number added to 7 times the number equals 44. Find the number.
A. 4x - 7x = 44; -6.3 B. 4(x + 7) = 44x; 0.7 C. 4x + 7x = 44; 4 D. 4x(7 + x) = 44; 6.3