Solve the problem.The temperature at the South pole was -2° at 8 am. At 3 pm, it was 3°. By how many degrees did the temperature rise?
A. by 1°
B. by -1°
C. by -5°
D. by 5°
Answer: D
Mathematics
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Write the number as the sum of two primes. There may be more than one way to do this.34
A. 29 + 5, 31 + 3, 23 + 11, 17 + 17 B. 21 + 13, 31 + 3, 29 + 5 C. 27 + 7, 29 + 5, 23 + 11 D. 15 + 19, 29 + 5, 23 + 11
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics
Sketch the vectors u and w with angle ? between them and sketch the resultant.
= 2.85, 
= 2.85, ? = 90°
A. 
B. 
Mathematics
Use Cramer's rule to solve the linear system.2x + 2y = 23x + y = -3
A. (3, -2) B. (-2, 3) C. (-3, -2) D. (2, -3)
Mathematics