Find the sum using a number line.-5 + 2
A. -7
B. 7
C. 3
D. -3
Answer: D
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Solve the problem. Round your answer to the nearest tenth, when appropriate.The position of an object moving in a straight line is given by s(t) = t2 - 8t, where s is in feet and t is the time in seconds the object has been in motion. How long will it take the object to move 
?
A. 9.5 sec B. 15.0 sec C. 8.4 sec D. 9.3 sec
Solve the problem.Claire has received scores of 85, 88, 87, and 80 on her algebra tests. What score must she receive on the fifth test to have an overall test score average of at least 82?
A. 68 or greater B. 69 or greater C. 70 or greater D. 71 or greater
Write the phrase as a variable expression. Use x to represent "a number."A number subtracted from 3
A. x - (3) B. 3 - x C. 3 + x D. 3x
Solve the system of equations.x1 - x2 + x3 = 8x1 + x2 + x3 = 6x1 + x2 - x3 = -12
A. (2, -1, 9) B. (-2, -1, -9) C. (2, -1, -9) D. (-2, -1, 9)