3 years ago

Which expression is a difference of squares with a factor of 2x + 5?

Mathematics

1 answer:

mars1129 [50]3 years ago

8 0

I am pretty sure it is 4(2+25) because if you factor it out you will get the factores form you got before.

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Mr. Morris is going to save money and replace his sailboat's mainsail himself. He must determine the area of the mainsail in ord

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The decomposition of the parallelogram into triangle then into a rectangle is shown below

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Area = 15 × 10 = 150 feet²

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3 years ago

the second term of a geometric sequence is 18 and the fourth term is 8 find the common ratio . And find the sum of the first 6 t

777dan777 [17]

Answer:

ratio: 2/3
sum: 73 8/9

Step-by-step explanation:

The general term of a geometric sequence is ...

an = a1·r^(n-1)

You have the 2nd and 4th terms, so ...

a2 = a1·r^(2-1) = a1·r

a4 = a1·r^(4-1) = a1·r^3

We can find r from the ratio ...

a4/a2 = (a1·r^3)/(a1·r) = r^2 = 8/18 = 4/9

Then r is ...

r = √(4/9) = 2/3 . . . . the common ratio

The first term is ...

a2 = 18 = a1·(2/3)

a1 = (3/2)·18 = 27

The sum of the first 6 terms is ...

Sn = a1·(r^n -1)/(r -1)

S6 = 27·((2/3)^6 -1)/(2/3 -1)

S6 = 27·(64/729-1)/(2/3-1) = (27)(665)/243 = 73 8/9

The sum of the first 6 terms is 73 8/9.

_____

<em>Check on the sum</em>

The first 6 terms are ...

27, 18, 12, 8, 5 1/3, 3 5/9

Their sum is 73 8/9, as above.

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3 years ago

A man wants to hike two trails. The length of one trail is 7.709 km. The length of the other trail is 9.0309 km. What is the tot

Naya [18.7K]

Answer:

Its addition I think so the answer would we 16.7399km for both trials

Step-by-step explanation:

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3 years ago

Two hikers stopped for a snack. They shared 2/3 of a pound of trail mix. If the hikers shared the trail mix equally, how much tr

allochka39001 [22]

each hiker gets 1 1/2

i hope this helped

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3 years ago

Read 2 more answers

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masya89 [10]

The answer to this problem is
55 fl oz

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3 years ago