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3 years ago

PLEASE HELP! WILL MARK BRAINLIEST!

Mathematics

2 answers:

____ [38]3 years ago

4 0

Answer:

b. 75

Step-by-step explanation:

a(n) = a1 + d(n-1)

a(n) = 8.5 + 3.5(n - 1)

a(20) = 8.5 + 3.5(20 - 1)

a(20) = 8.5 + 3.5(19)

a(20) = 8.5 + 66.5

a(20) = 75

Butoxors [25]3 years ago

4 0

Answer:

75.

Step-by-step explanation:

The nth term = a1 + d(n -1)

Therefore the 20th term = 8.5 + 3.5(20 - 1)

= 8.5 + 3.5 * 19

= 75

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Cities A & B are 5 inches apart on a map. Cities Ce Dare 4 inches apart. If C & D are 900 miles apart how many miles apa

Afina-wow [57]

Answer:

Cities A and B are 1,125 miles apart

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Distance between A and B in the map = 5 inches

Distance between C and D in the map = 4 inches

Real distance between C and D = 900 miles

2. How many miles apart are cities A and B?

We will solve the question, using Direct Rule of Three, as follows:

Distance in the map Real distance

A - B 5 inches x

C - D 4 inches 900 miles

***************************************************

4x = 900 * 5

4x = 4,500

x = 4,500/4

x = 1,125 miles

Cities A and B are 1,125 miles apart

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3 years ago

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maks197457 [2]

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$\bf n^{th}\textit{ term of a geometric sequence}\\\\
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r=\textit{common ratio}\\
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