Simplify the expression by combining like terms.-5(9r + 10) + 7(7r + 9)
A. 4r + 10
B. 4r + 5
C. 4r + 13
D. -95r
Answer: C
Mathematics
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Provide an appropriate response.Find the coordinates of all points (x, y) on the graph of the equation x2 + y2 = 2x + 2y where the tangent is horizontal.
A. (1, 1 + 
), (1, 1 - 
)
B. (1, 1), (1, -1)
C. (2, 2 + 
), (2, 2 - 
)
D. (2, 0), (2, 2)
Mathematics
Solve the system.
A. (4, -2, 1)
B.
| (-2, 4, 1) |
C. ?
D. (2, 4, -1)
Mathematics
Solve the problem.Jake wants to work 3
hours at his part-time job this week. He has already worked 
How many more hours does he need to work?
A. 2
hr
B. 6
hr
C. 1 hr
D. 
hr
Mathematics
Determine if the given value is a solution to the equation.-64
8(y - 8) = 10y - 64
A. Yes B. No
Mathematics