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ch4aika [34]
3 years ago
6

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?
Mathematics
1 answer:
FrozenT [24]3 years ago
4 0

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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6(2x + 5) = 2(3x – 2) <br> solution ? I NEED IT NOW SOMEONE PLEASE HELPPPPP!!!
AlladinOne [14]

\fbox{x = -17/3}

Explanation:

6(2x + 5) = 2(3x – 2)

[given]

6(2x) + 6(5) = 2(3x) + 2(-2)

12x + 30 = 6x – 4

[distributive property of equality; individually multiply each addend inside the parenthesis and simplify (distribute the terms) ]

12x + 30 = 6x – 4

–6x –6x

6x + 30 = -4

[subtraction property of equality; subtract both sides by 6x in order to keep the x term on the left side]

6x + 30 = -4

–30 –30

6x = -34

[subtraction property of equality; subtract both sides by 30 in order to keep the constant term on the right side]

6x = -34

÷6 ÷6

x = -34/6

[division property of equality; divide both sides by 6 to eliminate the coefficient of 6 in 6x in order to obtain the variable x]

x = -17/3

[GCF(greatest common factor); divide both sides by the greatest common factor until both numbers are prime (only divisible by 1 and itself]

6 0
3 years ago
Read 2 more answers
Please, help I don’t understand what im supposed to do.
Blizzard [7]

Answer:

16,800 votes.

Step-by-step explanation:

In the singing competition 42,000 votes were counted.

The winner received 3/5 of the votes.

The part of the votes that the winner did not receive was 1 - 3/5 = 2/5

So the winner did not receive 2/5 of 42,000 votes which is equivalent to:

\frac{2(42,000)}{5} = 16,800 votes.


3 0
3 years ago
Find the distance between the points (1,3) and (5,0).
Irina18 [472]

distance between two points is [(x2-x1)^2 +(y2-y1)^2]^1/2

I.e,[{5-1)^2+(0-3)^2]^1/2

[16+9]^1/2

[25]^1/2

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Answer:

Science? :)

Step-by-step explanation:

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Answer- embryology .....
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