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Dominik [7]
2 years ago
6

10. The fifth term of an arithmetic sequence is 11 and the tenth term is 41. What is the first term? ​

Mathematics
2 answers:
Tanya [424]2 years ago
5 0

Answer:

-13

Step-by-step explanation:

"Arithmetic sequence" is a big clue, because it means you add on the same amount every time the term number goes up by 1, then add on the same amount to the numbers in the sequence (the list of numbers) see image There are of course formulas to find these missing numbers, but also, crunch it out sometimes so that it makes sense. And when the numbers in the question get crazy you can fall back on the formulas.

9966 [12]2 years ago
4 0

a_{5}=a+4d=11\\a_{10}=a+9d=41

Solve the above equations,

a_{10}-a_{5}=41-11\\a+9d-a-4d=30\\5d=30\\d=6\\a=11-24=-13

First term is -13.

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What is the surface area of a square pyramid that has a base length of 5 inches and triangular faces that are 9 inches tall
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Answer:

115 in²

Step-by-step explanation:

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Step-by-step explanation:

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7 0
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A total of 26 bills are in a cash box. Some of the bills are one-dollar bills, and the rest are five-dollar bills. The total amo
kobusy [5.1K]

Answer:

Number of 1 $ bill = 20

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Explanation:

 Let p represent number of one dollar bolls and q represent number of five bills.

A total of 26 bills are in a cash box.

      p + q = 26    ------------------------- Equation 1

The total amount of cash in the box is $50

      p + 5q = 50    ------------------------- Equation 2

Equation 2 - Equation 1,

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3 0
3 years ago
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