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Tresset [83]
3 years ago
12

What is the fourth term of this sequence? (explanations appreciated!)

Mathematics
1 answer:
xxTIMURxx [149]3 years ago
7 0

Answer:

Forth term of the sequence is 61

Step-by-step explanation:

Let's just go from a1 to a4:

a1 = 5

a2 = 2x5+3 = 13

a3 = 2x13+3 = 29

a4 = 2x29+3 = 61

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Please help asap tysm <3
loris [4]

Answer:

9:20 AM

Step-by-step explanation:

they spend 4 hours in total doing activities

We get this value by adding up all the time spent

1:30pm - 4 hours =

9:20 AM

5 0
2 years ago
63 = −8d + 7<br> ................
Rama09 [41]

Answer:

the answer is 7

Step-by-step explanation:

8d +7=63

-7. -7

_________

8d = 56

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8. 8

56 divided by 8 is 7

8 0
3 years ago
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You want to calculate the value of your car each year when it depreciates by 15%. What does the term y mean in the exponential f
insens350 [35]

Answer:

Value of the car after x years

Step-by-step explanation:

Exponential functions are generally expressed in the form: y=a(b)^x and since this function is decreasing, meaning it has an exponential decay, it can be expressed as: y=a(1-r)^x where r=rate of decay.

In this case the a represents the initial value or y-intercept, since when x=0, (1-r)^0 = 1, so we just have y=a(1) or y=a

The r represents the rate of decay

the x usually represents the time in seconds, days, months, or whatever unit is being used

The y value represents the value of whatever your measuring, and in this context it represents the value of the car after x years.

This is because a represents the initial value

After one year it's only 85% worth it's initial value or 15% less which is represented as 0.85(a)

After two years it's only 85% worth the previous year or 15% less the previous year, which is represented as 0.85(0.85(a))

This will continue to decrease the number of years increase

4 0
1 year ago
Read 2 more answers
I need help solving $27 ticket with 10% discount
weqwewe [10]

The answer would be $2.70

7 0
3 years ago
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A doctor is measuring the mean systolic blood pressure of female students at a large college. Systolic blood pressure is known t
Nana76 [90]

Answer:

The correct option is (b).

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for population mean (<em>μ</em>) is:

CI=\bar x\pm z_{\alpha/2}\times\frac{SD}{\sqrt{n}}

The confidence interval for population mean can be computed using either the <em>z</em>-interval or <em>t</em>-interval.

The <em>t</em>-interval is used if the following conditions are satisfied:

  • The population standard deviation is not known
  • The sample size is large enough
  • The population from which the sample is selected is normally distributed.

For computing a (1 - <em>α</em>)% confidence interval for population mean , it is necessary for the population to normally distributed if the sample selected is small, i.e.<em>n</em> < 30, because only then the sampling distribution of sample mean will be approximated by the normal distribution.

In this case the sample size is, <em>n</em> = 28 < 30.

Also it is provided that the systolic blood pressure is known to have a skewed distribution.

Since the sample is small and the population is not normally distributed, the  sampling distribution of sample mean will not be approximated by the normal distribution.

Thus, no conclusion can be drawn from the 90% confidence interval for the mean systolic blood pressure.

The correct option is (b).

5 0
3 years ago
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