All categories

3 years ago

What is the value of b? 0.4(3b+10)=19

Mathematics

2 answers:

svet-max [94.6K]3 years ago

7 0

Hello!!

Isolate the variable by dividing each side by factors that don't contain the variable.

Your answer is 12.5.

Hope that you pass your test!!

Aloiza [94]3 years ago

6 0

0.4(3b + 10) = 19

First: Distribute

0.4 x 3b = 1.2b

0.4 x 10 = 4

1.2b + 4 = 19

Second: Subtract 4 from both sides

+ 4 - 4 cancels out

19 - 4 = 15

1.2b = 15

Third: Divide 1.2b on both sides

1.2b/1.2 cancels out

15/1.2 = 12.5

Answer: b = 12.5

Hope this Helps!!

You might be interested in

Yvonne is using a coordinate grid for the first time she wants to find out the location of the ordered pair (3,7) on the grid .

tigry1 [53]

She should start on the x axis (the one that's horizontal or goes left to right) and should go to the right first. Right is positive and the first number is a positive three so she would go to the right three units first.

5 0

3 years ago

Are they all correct ? And help with the number 4 please ? Thank you

nirvana33 [79]

Yes they are all correct and for number 4 compare write your own comparison of 2 things like if people like dogs more or cats more

4 0

3 years ago

Write an equation in slope intercept form that satisfies the given conditions parallel

Alecsey [184]

Please give us the options

7 0

3 years ago

Add fraction 6 4/5 + 3 7/10 how do i add this fraction

Dafna1 [17]

The answer is 10 1/2.

First you need to convert 4/5 and 7/10 so the denominator is the same. 4/5=8/10, 7/10 stays the same.

Now we add= 6 8/10 +3 7/10 =9 15/10.
9 15/10=10 5/10=10 1/2.

Hope this helps and hope you have a great day and please make brainiest

7 0

3 years ago

Read 2 more answers

A simple random sample of 50 items from a population with 7 resulted in a sample mean of 35.

Vilka [71]

The 90% , 99% confidence interval for the population mean is 32.145 < $\rm \mu$ < 35.855 and 31.093 < $\rm \mu$ < 36.907

<h3>What is Probability ?</h3>

Probability is the study of likeliness of an event to happen.

It is given that

Total Population = 50

Mean = 35

The confidence interval is given by

$\rm CI = \mu + z \dfrac{s}{\sqrt n}$

$\rm \mu$ is the mean

z is the confidence level value

s is the standard deviation

n is the population width

(a) The 90% confidence interval for the population mean

90% $\rm \alpha / 2$ = 0.05

Z = 1.64

34 $\rm \pm$ 1.64 * 8 / √50

34 $\rm \pm$ 1.855

32.145 < $\rm \mu$ < 35.855

(b) The 99% confidence interval for the population mean

99% $\rm \alpha / 2$ = 0.005

Z=2.57

34 $\rm \pm$ 2.57 * 8 / √50

34 $\rm \pm$ 2.907

31.093 < $\rm \mu$ < 36.907

Therefore the confidence interval for population mean has been determined.

The complete question is

A simple random sample of 50 items from a population width =7 resulted in a sample mean of 35. If required, round your answers to two decimal places.

a. Provide a 90% confidence interval for the population mean

b. Provide a 99% confidence interval for the population mean

To know more about Probability

brainly.com/question/11234923

#SPJ1

8 0

2 years ago

What is the value of b? ​ 0.4(3b+10)=19 ​

What is the value of b? 0.4(3b+10)=19