Answer:
Option A is correct.
Value of 
Step-by-step explanation:
Given: 
and common difference(d) = 3.4
A sequence of numbers is arithmetic i.e, it increases or decreases by a constant amount each term.
The sum of the nth term of a arithmetic sequence is given by;
, where n is the number of terms, a is the first term and d is the common difference.
We also know the nth tern sequence formula which is given by ;
......[2]
First find a.
it is given that
Put n =12 and d=3.4 in equation [2] we have;
2.4 = a + 37.4
Simplify:
a = - 35
Now, to calculate 
we use equation [1];
here, n =2 , a =-35 and d=3.4
Simplify:
Therefore, the sum of sequence of 22nd term i.e,
The conference call lasts 90 minutes. Minutes at daytime rate is 7pm to 8pm, 60 minutes, and at nighttime rate, 30 minutes.
60 mins @ 5c/min=$3. 30 mins @ 3c/min=$0.90. Total before conference charge: $3.90. Total cost=3.90×1.5=$5.85.
Answer:
24
Step-by-step explanation:
LHS and RHS have same length so 66 - 42 = 24
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Answer:
C is the correct option.
Step-by-step explanation:
We have been given that
The profit is the difference of revenue and cost function.
Mathematically, we can write profit function as
We know that 
. Thus, we have
Plugging, the r(x) and c(x) functions
Distribute negative over the parenthesis
Combine the like terms. 20x-4x = 16x
C is the correct option.
Simple division! 2 books are 18 then 1 book must be half of that! 18 <span>÷ 2 = 9
Plz "brainliest" because i need some brainly's <3</span>
