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Ket [755]
3 years ago
10

Calculate for y given that mean of 20,2y,25,y,30 is 27​

Mathematics
1 answer:
masha68 [24]3 years ago
3 0

Answer:

y = 218

Step-by-step explanation:

Mean = (Sum of all numbers)/(How many numbers present)

27 = (20 + 2y + 25 + y + 30)/27

27 = (3y + 75)/27

3y + 75 = 729

3y = 729 - 75

3y = 654

y = 218

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find an expression for the area of a rectangle of sides 2x+3 and x-1 given that the perimeter is 28cm what is the value of x
Ierofanga [76]

Answer:

4cm

Step-by-step explanation:

Given data

L=(2x+3)

W=(x-1)

P=28cm

A= L*W

A= (2x+3)*(x-1)

open bracket

A= 2x^2-2x+3x-3

collect like terms

A= 2x^2+x-3

P= 2L+2W

P= 2*(2x+3)+2(x-1)

P= 4x+6+2x-2

collect like terms

P= 6x-4

but p= 28

28= 6x-4

28-4= 6x

24= 6x

x= 24/6

x= 4cm

Hence x= 4cm

4 0
3 years ago
A Class 4 truck weighs between 14,000 and 16,000 pounds.
Nady [450]

Answer:

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Step-by-step explanation:

6 0
3 years ago
How do I round 4.75 up to the nearest whole number
Ksenya-84 [330]
4.75.
the whole number is 4
circle 4 and see whether the number beside it
in this case its 7
(Any number that is 5 - 9 causes the number that you are rounding off to to increase)
( any number that is 4-1 causes the number that you are rounding off too to remain)
in this case since its 7 which more that 5 and the whole number increases therefore the final answer is 5.

Hope this helps! xD
would not mind if you put it as the brainliest answer
7 0
3 years ago
Johnny’s electric bill is a variable expense. What is the average amount he pays for electricity if he paid $235 in December, $1
Flura [38]

Answer:

$200

Step-by-step explanation:

Hope this helped you!!

8 0
2 years ago
Read 2 more answers
ANSWER WITH AN EXPLANATION PLEASE! <br><br><br> ;-;<br><br><br> C:
zalisa [80]

Answer:

The answer is C. a = -4,000 m

Step-by-step explanation:

If you subtracted 31,000 from 35,000, you would get 4,000 in a minute. Do the same for the rest, you would also get 4,000 m in a minute, so the answer would be a = -4,000 m

8 0
3 years ago
Read 2 more answers
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