Variable
variables are any letters you use, such as in 3x, x is your variable. It holds an unknown value
Say x is the amount of $10 bills and y is the amount of $20 bills
10x+20y=340
x+y=23
you would have to cancel out an x or y so let's cancel out the x
10x+20y=340
-10(x+y=23)
which becomes
10x+20y=340
-10x-10y=230
which equals
0x+10y=110 or y=11
so there are 11 $20 bills...
x+11=23
-11 -11
x=12
which means there are 12 $10 bills
The answer is 11 $20 bills and 12 $10 bills
Answer:
S5 = 0.75
As n increase, the terms gets smaller and the harder for partial summation to approach whole number.
Step-by-step explanation:
When the numerical value of r is less than 1 ( - 1 < r < 1), then the formula Sn = a(1−r^n)/(1−r) is used.
Where a = first term
r = common ratio
n = number of terms
So a = 1/2
Second term = 1/6
r = S2/a
r =( 1/6 )/(1/2)
r = 1/3
n = 5
S5 = 1/2(1−(1/3)^5)/(1−(1/3))
S5 = 0.7469
To nearest hundredth
= 0.75
As n increase, the term gets smaller and the harder for the summation to approach 1 .
Answer:
1/7
Step-by-step explanation:
$1, 7 students
simply put 1 over 7 and you've got your fraction.
Answer:
3
Step-by-step explanation:
12÷4=3
Hope this will help you!