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Hunter-Best [27]
3 years ago
10

5x+8=23 im so lost on how to solve these equations

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
5 0
5x+8=23 (minus 8 from both sides)
5x=15 then divide by 5 (23/5)
 x= 3


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It is estimated that light takes 110,000 years to travel the full distance across our galaxy
stepladder [879]
\bf \stackrel{light~speed}{3.0\times 10^8}ms^{-1}\implies \stackrel{light~speed}{3.0\times 10^8}~\frac{m}{s}\implies 300,000,000~\frac{m}{s}\\\\
-------------------------------\\\\
\textit{how many seconds in a minute?}\qquad 60
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\textit{how many seconds in }\stackrel{1~hr}{60~minutes?}\qquad 60\cdot 60
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\textit{how many seconds in }\stackrel{1~day}{24~hrs}?\qquad 60\cdot 60\cdot 24
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\textit{how many seconds in }\stackrel{1~year}{365~days}?\qquad 60\cdot 60\cdot 24\cdot 365

now, it takes 1 second for light to travel 300,000,000 meters.

if we know it takes light 1 second to go 300 million meters, then in 365 days or a year, or 60*60*24*365 seconds, it will then travels

300,000,000 * 60 * 60 * 24 * 365 meters in 1 year,

how about in 110,000 years, how many meters has it travelled?

300,000,000 * 60 * 60 * 24 * 365 * 110,000   that many meters.

we know she travels the Milky Way in 110,000 years  or 60 * 60 * 24 * 365 * 110,000  seconds

and we know that 110,000 years is 3468960000000 seconds, so

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4 0
3 years ago
Which statements are true about the residual plot and the equation for the line of best fit for the data? select two options.. t
Nataly [62]

The statements are true about the residual plot and the equation for the line of best fit include:

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<h3>What is Residual plot?</h3>

This shows the residuals on the vertical axis and the independent variable on the horizontal axis.

Since the plot has a curved pattern, the equation for the line of best fit is not a good approximation for the data as the result will be inaccurate.

Read more about Residual plot here brainly.com/question/16180255

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8 0
2 years ago
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Elodia [21]

Answer:

24.75 = 3*4.50 + x*4.50

x= 2.5 pounds of Granny Smith apples

Step-by-step explanation:

Gala apples = 3 lbs

Granny apples = x lbs

They cost 4.50 a pound

Total cost = 24.75

Total cost = gala apples * cost per pound + granny apples * cost per pound

Substitute in what we know

24.75 = 3*4.50 + x*4.50

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Subtract 13.50 from each side

24.75-13.50 = 13.50-13.50 + 4.5x

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Divide by 4.50 on each side

11.25/4.5 = 4.5x/4.5

2.5 =x

6 0
3 years ago
Read 2 more answers
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timurjin [86]

Answer:

24 because it is the middle number

Step-by-step explanation:

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Ostrovityanka [42]

Answer:

no

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at firth hr - 15×2=

2 nd hr - 60×2

and so on,it takes more than 8 hr

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