If you multiply 4 by 4 tenths, the answer is 1.6
tenth = 0.1
four tenths = 0.4
4(0.4) = 1.6
He must've left you. My sincere apologies.
D 180 degrees
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Solution
Step 1
Two distinct lines intersecting each other at 90° or at right angles are perpendicular to each other.
Hence apply this to question 8 the type of lines shown in the figure is perpendicular lines. Option C
Step 2
To explain this as stated above line A and line B intersect each other at a right angle hence line A and B are perpendicular lines. The line segments are seen below.
51. is -150. you just minus 350 from 200