the mean of Gregs journey times to work on 3days was 28minutes If it took him 27min and 25min on two of the days how long did it take him on the third day
Answers
(27 + 25 + x)/3 = 28
To work out what the third day (x) was, we must work backwards and do the opposite.
If finding the mean was adding then dividing, to find the value, we must multiply and then subtract.
Instead of diving by 3, we multiply by 3
28 x 3 = 84
Next we subtract the two values we already have, from 84
84 - 27 = 57
57 - 25 = 32 minutes
On the third day, Greg took 32 minutes to get to work.
in this case
(25+27+x)/(3)=28
solve for x
multiply both sides by 3 to clear fraction
25+27+x=84
add like terms
25+27=55
52+x=84
subtract 52 from both sides
x=32
he worked 32 mins
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Simplify the expression below. 1/2 • 6+ 9 - (18÷6)
Answers
The 9 in 69,143 represents 9,000.
WHY?
Because the 9 is in the thousands place. So, therefore, our answer is correct.
Hope this helps! :D
60000+9000+100+40+3. Try that in the calculator and you'll know I'm correct
[A] (4, 10)
[B] (7, 9)
[C] (−6, −14)
[D] (−1, −7)
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Answers
So Now we are left with 2 options A and C. Lets figure it out.
We know that Carlos has 5 complete set with 4 individual figures and josh has 3 complete sets with 14 individual figures.
So lets write in the numerical language:-
let us assume that complete sets are X.
ATQ,
5x + 4 ≥ 3x + 14
subtracting 3x from both sides.
5x -3x + 4 ≥ 14
2x + 4 ≥ 14
subtracting 4 from both sides
2x ≥ 14 - 4
2x ≥ 10
dividing both sides by 2
x ≥ 5 Answer
So correct answer option is C
Answers
First solve LHS
6 x2 4 x2 12 12 12
Hope it helps!
Answers
Answers
The total yards of tubing the plumber will use is given by A = 8 yards
What is unit conversion?
In order to translate measurements of a particular amount between different units, a mathematical conversion factor is usually used. This modifies the measurement of the quantity without altering its effects.
The particular circumstances or the intended result control the conversion process. This may be governed by law, a contract, a list of technical specifications, or other publicly available standards.
A precise conversion from one system to another is necessary for some measures in order to maintain the precision of both the original measurement and the conversion.
Based on the connection between a particular pair of original units and a particular pair of target units, each conversion factor is chosen.
Given data ,
Let the total yards of tubing the plumber will use be A
Now , the equation is
Let the total inches of tubing used for each washing machine = 16 inches
And , from the unit conversion ,
16 inches = ( 16/36 ) yards
So , the number of washing machines = 18 machines
Now , the total yards of tubing the plumber will use A = number of washing machines x 0.444
On simplifying , we get
The total yards of tubing the plumber will use A = ( 16 / 36 ) x 18
The total yards of tubing the plumber will use A = 8 yards
Hence , the total yards is A = 8 yards
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