Write a formula for 
by writing 
as
src="https://sciemce.com/media/3/ppg__cognero__Section_5.2_Sum_and_Difference_Formulas__media__b701c3ee-ddd6-45e7-89c6-87e677234f14.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_55edce9883834760bb9fe82f6" /> and using the formula for the cosine of a sum.
?
A. 
B. 
C. 
D. 
E. 
Answer: E
Mathematics
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?
A.
B.
C.
D.
E.
Answer: E
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Determine the number of significant digits in the given approximate number.0.0000467
A. 3 B. 4 C. 6 D. 10
Solve.3x2 - 3y2 = 12 2x2 + y2 = 8
A. (-2, 4), (2, 4) B. (-2, -4), (-2, 4), (2, -4), (2, 4) C. (-2, 0), (2, 0) D. (0, -2), (0, 2)
Evaluate the root, if possible.- 
A. Not real
B. - 22
C. - 
D. 
Find the intercepts of the quadratic function.f(x) = (x + 3)2 - 9
A. x-intercepts: (0, 0) and (-6, 0) y-intercept: (0, 0) B. x-intercepts: (0, 0) y-intercept: (0, 0) C. x-intercepts: (0, 0) and (-6, 0) y-intercept: (0, -9) D. x-intercepts: (0, 0) and (6, 0) y-intercept: (0, 0)