Find the mistake, then find the correct answer.Solve for x: 5x2 - 7x + 1 = 0line 1 x = 
line 2 x = 
line 3 x = 
What will be an ideal response?
| line 1 should be | x =  |
line 3 should be x =
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Describe the graph of the polar equation.r2 + 2r2sin ? cos ? = 400
A. Two horizontal lines passing through (0, ±20) B. Parabola opening upward with vertex at (0, 20) C. Two straight lines of slope -1, y-intercepts (0, ±20) D. Parabola opening to the right with vertex at (20, 0)
Provide an appropriate response.34 mg + 55 cg = ? cg
A. 58.4 B. 8.9 C. 584 D. 89 E. none of the above
Use a calculator to find the approximate value of the composition. Round your answer to four decimal places. The expression may be undefined.cos (cos-1 (-0.9372))
A. -0.4686 B. 0.9372 C. 0.4686 D. -0.9372
Solve.A school has just purchased new computer equipment for 
The graph shows the depreciation of the equipment over 5 years. The point (0, 19,000) represents the purchase price and the point (5, 0) represents when the equipment will be replaced. Write a linear equation in slope-intercept form that relates the value of the equipment, y, to years after purchase x . Use the equation to predict the value of the equipment after 4 years.
A. y = - 19,000x + 19,000; value after 4 years is $-57,000.00 B. y = 19,000x + 5; value after 4 years is $3,800.00 C. y = - 3800x + 19,000; value after 4 years is $3,800.00; D. y = 3800x - 19,000; value after 4 years is $3,800.00