Answer
Find out the total number of minutes they played using associative property.
To proof
Associative property of addition
This property states that
a + ( b + c) = ( a +b) +c
Where a, b, c are the any numbers.
As given
Sophia Played for 18 minutes and 26 minutes last week should play the piano for 40 minutes last week
let
a = 18 minutes , b = 26 minutes , c = 40 minutes
Total number of minutes sophia played = a + ( b + c) = ( a +b) +c
put the value of a, b,c
Total number of minutes sophia played =18+(26 +40) = (18 +26) + 40
= 18 +66 = 44 + 40
= 84 = 84
satisfy the associative property
Therefore the total number of minutes sophia played be 84 mintues.
Hence proved
There 3 of them
.....................
2 equations: the first one is the sum of 2 unknown numbers x and y: x + y = 72. Now the difference is 25, so x - y = 25. Solve the first equation for y: y = 72 - x. Sub that into the second equation to solve for x: x - (72 - x) = 25. x - 72 + x = 25 and 2x - 72 = 25. Therefore, 2x = 97 and x = 48.5 That's the larger of the 2 numbers; since we subtracted y from x we defined x as the larger of the 2. Just for fun, plug x in to find that y = 23.5
Answer:
A
Step-by-step explanation:
Add the number of decimal places of the two numbers being multiplied to know the number of decimal places of the product.
A: 3.48 x 42.37 = 147.4476
2 decimal places + 2 decimal places = 4 decimal places
Only choice A is correct.
Simplify, <em>7(2x+y)+6(x+5y).</em>
<em>a:</em> <em>20x+37y</em>
<em> (7 • (2x + y)) + 6 • (x + 5y)
</em>
<em>Step 2 :
</em>
<em>Equation at the end of step 2 :
</em>
<em> 7 • (2x + y) + 6 • (x + 5y)
</em>
<em>Step 3 :
</em>
<em>Final result :
</em>
<h3><em> </em>
<em> 20x + 37y</em></h3>
Thanks,
<em>Deku ❤</em>
