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inysia [295]
3 years ago
9

The sum of 4 times a number and 5 equals 9. can someone please help!!! iwillchosebrainliestifcorect....!!!

Mathematics
1 answer:
inysia [295]3 years ago
6 0

Answer:

1

Step-by-step explanation:

let the number be x

4 times = 4x

the sum of 4 times a number and 5 equals to 9

4x + 5 = 9

4x = 9 - 5

4x = 4

divide both sides by 4

x = 1

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The sum of 3 consecutive odd numbers is 51. what is the second number in this sequence
cricket20 [7]

Answer:

17

Step-by-step explanation:

since it is in the middle you can just divide by 3 since one will be greater and one will be less so 51/3=17

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3 years ago
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How much does an ice cream cost with 11 ounces of toppings?
oksano4ka [1.4K]

<em>$3.00 for ice cream </em>

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3 years ago
Researchers are interested in the effect of a certain nutrient on the growth rate of plant seedlings. Using a hydroponics grow p
Ede4ka [16]

Answer:

1) The mean calculated for this case is \bar X=61.5

2)  61.5-5.4=56.1

3) 61.5+5.4=66.9

4) B. An interval estimate gives us a sense of the accuracy of the point estimate whereas a point estimate alone does not.

Because with the confidence interval we know the confidence level of the interval, and the limits for the parameter at some significance level.  

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Part 1

In order to calculate the mean and the sample deviation we can use the following formulas:  

\bar X= \sum_{i=1}^n \frac{x_i}{n} (a)  

s=\sqrt{\frac{\sum_{i=1}^n (x_i-\bar X)}{n-1}} (b)  

The mean calculated for this case is \bar X=61.5

The sample deviation calculated s=5.143

\mu population mean (variable of interest)

n=6 represent the sample size  

Part 2

The confidence interval for the mean is given by the following formula:

\bar X \pm ME   (1)

So if we have the margin of error 5.4mm we can find the lowr limit like this:

61.5-5.4=56.1

Part 3

61.5+5.4=66.9

Part 4

B. An interval estimate gives us a sense of the accuracy of the point estimate whereas a point estimate alone does not.

Because with the confidence interval we know the confidence level of the interval, and the limits for the parameter at some significance level.

4 0
3 years ago
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Liam has 9/10 gallon of paint for his birdhouses he sells at the fair. It takes 1/20 gallon of paint for each one. How many can
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Answer:

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Step-by-step explanation:

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8 0
2 years ago
Determine which of the following equations, when graphed, intersect at the point (4, 0). Select all that apply. x - y = 4 -x - y
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Answer: only (x-y=4) and (x+y=4).


Step-by-step explanation:

Notice target point has y=0, so all terms with y are zero. Then all 6 equations reduce to m x = k, for various m and k. So calculate 4×m and compare to k six times.


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2x + y = 7 8=7 no

2x + y = -7 8=-7 no.

6 0
3 years ago
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