The principle of a box camera in taking a picture is shown. The rays of light from the object A'B' pass through the opening L and form an inverted image A'B' on the film. How far from a 30' tree must L be placed to produce a 4" image on the film if the film is 8" behind L?
15'
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Provide an appropriate response.Given the solutions of a quadratic equation, is it possible to reconstruct the original equation? Why or why not?
What will be an ideal response?
Solve the equation.5x(x + 2) = (4x - 6)(x + 2)
A. 6 B. -6 C. 2, 6 D. -2, -6
The table gives the number of people (in thousands) who visited Australia and South Africa in 1998: To AustraliaTo South AfricaFrom North America440190From Europe950950From Asia1,790200? Figures are rounded to the nearest 1,000.You predict that, in 2008, 20,000 fewer people from North America will visit Australia and 30,000 more will visit South Africa, 80,000 more people from Europe will visit each of Australia and South Africa, and 150,000 more people from Asia will visit South Africa, but there will be no change in the number visiting Australia.Use matrix algebra to predict the number of visitors from the three regions to Australia and South Africa in 2008. ?
A. 
B. 
C. 
D. 
E. 
Find the slope of the line that goes through the given points.(-8, 19), (-7, 7)
A. 12
B. - 
C. - 12
D. - 