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Alexeev081 [22]
4 years ago
13

Answer question below.

Mathematics
2 answers:
san4es73 [151]4 years ago
4 0

Answer:

The third one.

Step-by-step explanation:

The square root of 81 is 9. The closest answer to that is the third one.

Papessa [141]4 years ago
4 0

Answer:

x is between 80 and 90

Step-by-step explanation:

Square both sides

x= 9^2, so 9*9

x=81

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The first term of an arithmetic sequence is -3 and the fifteenth term is 53. What is the common difference of the sequence?
vampirchik [111]
So, from the first term, to the fifteen term, there are 14 terms to go through.

that means, if say the common difference is say "d", we have to add "d" 14 times, to get to the 15th term, lemme make a quick table,

\bf \begin{array}{llll}
term&value\\
----&------\\
1&-3\\
2&-3+d\\
3&-3+d+d\\
4&-3+d+d+d\\
5&-3+d+d+d+d\\
6&-3+d+d+d+d+d\\
7&-3+d+d+d+d+d+d\\
8&-3+d+d+d+d+d+d+d\\
9&-3+d+d+d+d+d+d+d+d\\
10&-3+d+d+d+d+d+d+d+d+d\\
11&-3+d+d+d+d+d+d+d+d+d+d\\
12&-3+d+d+d+d+d+d+d+d+d+d+d\\
13&-3+d+d+d+d+d+d+d+d+d+d+d+d\\
14&-3+d+d+d+d+d+d+d+d+d+d+d+d+d\\
15&-3+d+d+d+d+d+d+d+d+d+d+d+d+d+d\\
&53
\end{array}\\\\
-------------------------------\\\\
-3+14d=53\implies 14d=56\implies d=\cfrac{56}{14}

and surely you know how much that is.
4 0
3 years ago
Martha made 3 birthday cards and she wants to make more. if she makes 5 cards an hour, How many cards will she have after 6 hour
frozen [14]
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In a rectangle, how do you determine what is length and what is width?
Ann [662]
Going side to side(horizontal) is always length and going up and down (vertical) width
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Solve for x*<br> (11x-24)<br> (3x-20)
inna [77]
Write the equation 11x-24+3x-20=180. The answer is 16.
7 0
3 years ago
Please help me <br> Due today.
VMariaS [17]

Answer:

C.

Step-by-step explanation:

3 0
3 years ago
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