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liberstina [14]

3 years ago

10

Let x be a constant. The 5th term of an arithmetic sequence is a5=16x+11. The 9th term of the sequence is a9=28x+19. Find the fi

rst term of the sequence. Write your answer in simplest form

1 answer:

shepuryov [24]3 years ago

7 0

19

Step-by-step explanation:

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According to astronomers, what is a "light year" answer key

liberstina [14]

A light-year is defined as the distance the light can cover in one year.

The light travels at speed of $c=3 \cdot 10^8 m/s$ , and one year converted into seconds is
$1 y = 365 \frac{d}{y} \cdot 24 \frac{h}{d} \cdot 60 \frac{m}{h} \cdot 60 \frac{s}{m}=3.15 \cdot 10^7 s$

So the distance covered by the light in one year is
$S=vt =(3 \cdot 10^8 m/s)(3.15 \cdot 10^7 s)=9.45 \cdot 10^{15} m$
And this is the distance that corresponds to one light-year.

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3 years ago

Solve the following proportion. P/6 = 7/8<br> A: P=5.25<br> B: P=8<br> C: P=10.5<br> D: P=42

ValentinkaMS [17]

Answer:

A

Step-by-step explanation:

given $\frac{P}{6}$ = $\frac{7}{8}$

using the method of cross- multiplication then

8P = 42 ( divide both sides by 8 )

P = $\frac{42}{8}$ = 5.25

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Geometry First Semester.<br>Can someone please help with this?

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