Adrian's mean score for four tests is 64%. He wants to increase his mean to 68% after the fifth test. What does he need to score
in the fifth test?
1 answer:
Answer:
He has to score 84 %
Step-by-step explanation:
64 + 64 + 64 + 64 = 256
5*68 = 340
340 - 256 = 84
(64 + 64 + 64 + 64 + 84)/ 5 = 68
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Answer:
The son is 4years old
Step-by-step explanation:
Let the son's age=x
the father's age=8x
IN 10YEARS,
Son's age=x+10
father's age=8x+10
Equate them
8x+10=3(x+10)
8x+10=3x+30
5x=20
x=4
Answer:
irrational
Step-by-step explanation:
It cant be square rooted perfectly.
If slope of first line is 3 and is perpendicular to second line
then second line has a slope of -1/3
twice means "multiply by 2"
increased means "add"
2n + 4 = 18
