O evaluate<span> an algebraic </span>expression<span>, you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12. If we know the value of our variables, we can replace the variables with their values and then </span>evaluate<span> the </span>expression<span>.</span>
Answer:
40
Step-by-step explanation:
10n+40+n+30=180
n=10
4n=4(10)=40
n+30=(10)+30=40
Answer: See below for table
<h3>
Explanation:</h3>
What we know:
- Mary is 1st
- Isabella is a few seconds behind Mary
- Pilar is two places behind Isabella
- Anna is ahead of Pilar
How to solve:
Using Mary as a starting point, we can make accurate guesses to each person's rank.
<h3>
Process:</h3>
Mary
1st place, known constant
Isabella
2nd place, just behind Mary
Pilar
4th place, 2 places behind Isabella
Anna
3rd place, ahead of Pilar and behind Isabella
<h3>
Solution:</h3>
___________
Place | Name
1st | Mary
2nd | Isabella
3rd | Anna
4th | Pilar
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You would need too do 5*5=25 if you did 5*7=35 that would be wrong
This is the obvious answer, considering that the denominator can NEVER equal zero.
I am joyous to assist you anytime.