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AnnZ [28]
2 years ago
8

Help with Number 7 and 8??

Mathematics
1 answer:
valkas [14]2 years ago
4 0
The lenght on the top on B. The length is 2 times more tan on sandbox 1.
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36.3333 rounded to the nearest 10th
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Three times a number increased by ten is equal to twenty
JulijaS [17]

Answer:

The number is 10/3

Step-by-step explanation:

<u>Step 1:  Convert words into an expression</u>

Three times a number increased by ten is equal to twenty

(3n) + 10 = 20

<u>Step 2:  Subtract 10 from both sides</u>

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6 0
3 years ago
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When n=1 there is 1 dot. when n=2 there are 3 dots, when n=3 there are 6 dots. notice that the total number of dots increases by
gayaneshka [121]

Answer:

<h3>Part A</h3>
  • d(n) = n(n + 1)/2
  • n = 1 ⇒ d(1) = 1(1 + 1)/2 = 2/2 = 1, proved
<h3>Part B</h3>
  • d(k) + (k + 1) =
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  • d(k + 1)
  • Proved

6 0
2 years ago
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