Find the coordinates of the y-intercept for the given equation.y = 9x - 7
A. (0, 7)
B. (9, -7)
C. (-7, 0)
D. (0, -7)
Answer: D
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Write a numerical expression for the phrase and simplify it.The product of 
and 
, divided by - 
.
A. 
; - 
B. 
; - 
C. 
; - 
D. 
; - 
Solve the problem.In the formula A = Iekt, A is the amount of radioactive material remaining from an initial amount I at a given time t and k is a negative constant determined by the nature of the material. A certain radioactive isotope has a half-life of approximately 900 years. How many years would be required for a given amount of this isotope to decay to 75% of that amount?
A. 299 yr B. 225 yr C. 374 yr D. 1800 yr
Solve the following systems of linear equations using Gaussian elimination.
x + 2y + 2x = -1 x + 3y + 2z = 3 x + 3y + z = 4
Factor completely.6x2 - 26x - 20
A. 2(3x - 2)(x + 5) B. 2(3x + 2)(x - 5) C. (3x + 2)(2x - 10) D. (6x + 4)(x - 5)