Sean answers 4/5 of the questions on a test correctly. If there are 100 questions, how many did he not answer correctly?
2 answers:
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Answer:
option b
Step-by-step explanation:
the denominator is in the surd form, so it must be rationalized
Answer:
Step-by-step explanation:
Question: 5 - 7(z+1) = 7(-9-3z)
We multiply the number in front of the bracket first, since that is multiplication.
--> 5 -7z -7 = -63 - 21z
--> -7z -2 = -63 - 21z
Now, we move all the z and all the numbers to each side.
--> -7z +21z = -63 +2
--> 14z = -61
--> z = -61/14
This cannot be simplified further, so z is -61/14.