I really think it is the 2 one and I real think it is 5 but I think lot is 5
Answer:prism
Step-by-step explanation:
In order to find the <u>common difference</u> of the data in the problem you have to follow those steps
we know that
In an <u>Arithmetic Sequence</u> the difference between one term and the next is a constant. This constant is called <u>common difference</u>
Let




so



therefore
the answer is
the common difference is 
C
the sum to infinity of a geometric series = 
where a is the first term and r the common ratio
=
= 81 × 3 = 243
Answer:
Step-by-step explanation:
What he did at the end of the given equations is solve for x in x + 8y= 21
x = 21 - 8y Substitute that result in the top equation.
<u><em>7(21 - 8y) + 5y = 14 </em></u> is the correct step To continue Remove the brackets
147 - 56y + 5y = 14 Combine
147 - 51y = 14 Add 51y to both sides.
147 = 51y + 14 Subtract 14 from both sides.
133 = 51y divide by 51
y = 2.61 rounded.
The incorrect step is <em><u>underlined and italicized.</u></em>