Solve.A weather forecaster has predicted a high temperature of 19° C for tomorrow. Find this temperature in degrees Fahrenheit.
A. 42.6° F
B. 66.2° F
C. 2.2° F
D. -21.4° F
Answer: B
Mathematics
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Calculate the direction of 
and the midpoint of line segment P1P2.P1(4, 2, 2) and P2(14, 12, 7)
A. 
i + 
j + 
k; 
B. 
i + 
j + 
k; 
C. 
i + 
j + 
k; 
D. 
i + 
j + 
k; 
Mathematics
Perform the indicated operation. Simplify your answers. 
+ 
A. 
B. 
C. 
D. 
Mathematics
Find the values of a and b that would cause the graph of 
to pass through the points 
and 
class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_091544df71644ac8937d8101c" />.
?
?
A. 
B. ?
C. a = 3?, ?b? = 21
D. 
E. ?
Mathematics
Find the exact value of the expression.sin(-300°)
A. 
B. -1
C. 
D. 
Mathematics