You would use multiplication
Twenty-seven plus nineteen? or 20+7+10+9? or 2 tens and 7 ones + 1 ten and 9 ones? I'll do all of them.
twenty-seven plus nineteen equals forty-six
20+7+10+9=40+6
2 tens and 7 ones + 1 ten and 9 ones = 4 tens and 6 ones.
Hope this helps!
7r-15= r+27
Move +r to the other side. Sign changes from +r to -r.
7r-r-15= r-r+27
6r-15= 27
Move -15 to the other side. Sign changes from -15 to +15
6r-25+15= 27+15
6r= 42
Divide by 6 for 6r and 42
6r/6= 42/6
r= 7
Answer : r= 7
Given:
The function is
To find:
The value f'(4).
Solution:
We have,
Putting 
and 
we get
Differentiate with respect to t.
At 
, we get
Therefore, the value of f'(4) is 2.
