Answer:
<em>9*364 - 9*125 - 9*39 = 1,800</em>
Step-by-step explanation:
<em>Mental Calculation</em>
If we detect known patterns in the calculations, we could easily give their results without the use of calculators.
We are given the expression to evaluate:
9*364 - 9*125 - 9*39
The first thing to note is the 9 is a common factor of all terms, thus we take it out:
9*(364 - 125 - 39)
The negative numbers can be easily added
125
+ 39
------------
164
Now our expression is much easier:
9*(364 - 164)
The subtraction of 364-164 is 200, thus the result of the operations is:
9*200. We only need to recall 9*2=18 and add two zeros to get 1,800, thus:
9*364 - 9*125 - 9*39 = 1,800
Answer:
All real numbers
Step-by-step explanation:
Answer:
<em>K</em>=<em>2h</em>
<em>k</em><em>=</em><em>0.5h</em>
<em>k</em><em>=</em><em>h</em><em> </em><em>+</em><em> </em><em>1</em>
<em>k</em><em>=</em><em> </em><em>0.5h</em><em> </em><em>+</em><em> </em><em>1</em><em>0</em>
Answer:
x=2,y=2
Step-by-step explanation:
3y-1 = 5
or, 3y = 5+1
or, y = 6/3
y = 2
2x+1 = 3y-1
or, 2x = 3×2-1-1
or, 2x = 4
or, x = 2
Answer:
c=−m+s
Step-by-step explanation:
