The only correct statement is that ratios are not fractions.
3 moer than (3+) 2 times the numbe of books he sold in the second week (2 times second week)
first week=3+(2 time 2nd week)
total ie sold 18
so
first week+second week=18
3+(2 times 2nd week)+2nd week=18
solve
minus 3 both sides
3-3+(2 times 2nd week)+2nd week=18-3
0+(2 times 2nd week)+2nd week=15
(2 times 2nd week)+2nd week=15
add
3 times 2nd week=15
divide both sides by 3
2nd week=5
sub back
first week+second week=18
first week+5=18
minus 5
first week=13
he sold 13 in the first week
Answer:
At least 67 votes
Explanation:
We were given the following information:
There are 100 senators in the US senate,
At least 2/3 of them vote yes in order to ratify or approve, a treaty
The least number of votes needed is calculated below:
Therefore, they must have at least 67 votes to ratify a treaty
You use and calculator and type in the number and then the calculator tells you what’s that answer
Answer:
d = (a[n2] -a[n1])/(n2 -n1)
a1 = a[n1] -d(n1 -1)
Step-by-step explanation:
The generic term is ...
an = a1 +d(n -1)
Fill in the values associated with the two terms and solve the simultaneous equations.
For terms n1 and n2, their difference will be ...
a[n2] -a[n1] = (a1 +d(n2 -1)) -(a1 +d(n1 -1)) = d(n2 -n1)
Dividing by the coefficient of d tells you ...
d = (a[n2] -a[n1])/(n2 -n1)
Once you have the value of d, you can find the first term.
a[n1] = a1 +d(n1 -1)
a1 = a[n1] -d(n1 -1)
_____
<u>Example</u>:
3rd term = 12
7th term = 20
d = (20 -12)/(7 -3) = 8/4 = 2
a1 = a3 -d(3 -1) = 12 -2(2) = 8
The n-th term is ...
an = a1 +d(n -1)
an = 8 +2(n -1)