Solve the equation for y.4x + y = 20
A. y = 20 - 4x
B. y = 4x + 20
C. y = 5 - x
D. y = 
Answer: A
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Multiply.9x3y(xy2 + 5)
A. 9x + 5x3y B. 45x3y C. x4y3 + 45x3y D. 9x4y3 + 45x3y
Find the center and the radius of the sphere that has the given equation.
x² + y² + z² - 10x + 4y = 0
Find an equation of an ellipse satisfying the given conditions.Foci: (±8, 0), vertices: (±10, 0)
A. 36x2 - 100y2 = 36 B. 36x2 + 100y2 = 100 C. 100x2 + 36y2 = 3600 D. 36x2 + 100y2 = 3600
Solve the problem.Consider the following simplified digital photograph that has a 3 × 3 grid with four gray levels numbered from 0 to 3. It shows a letter Y in black on a light gray background.
Let A be the 3 × 3 matrix that represents this figure digitally. Find the matrix B for which A + B represents the entire picture becoming one shade lighter.
A. 
B. 
C. 
D. 