1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nady [450]
3 years ago
5

Thirty-eight is

align="absmiddle" class="latex-formula"> of what number?
Mathematics
1 answer:
Lisa [10]3 years ago
5 0

Answer:

The number is 95.

Step-by-step explanation:

Solution,

Let the number be 'x'.

So, \frac{2}{5} of 'x' = \frac{2}{5}x

Now according to question, \frac{2}{5}x is equal to 38.

So we can frame it as;

\frac{2}{5}x=38

Now we solve it;

For solving it we will multiply both side by '5' using multiplication property and get;

\frac{2}{5}x\times5=38\times5\\\\2x=38\times5

Now using division property, we will divide both side by '2' and get;

\frac{2x}{2}=\frac{38\times5}{2}\\\\x=19\times5=95

Hence The number is 95.

You might be interested in
A rectangle has a perimeter of 103.6 inches and a base of 39 inches. What is the height?
rusak2 [61]

Answer:

12.8 IN.

Step-by-step explanation:

So, what exactly is perimeter?

Perimeter= 2L+ 2W

In this question we were given the length.ie.Base and the perimeter itself.

●Length is 39 In.

●Perimeter is 103.6 In.

●We don't know the width.

But, as per given the question, we know that;

1 length = 39 In.

2 lengths= 78 In.

Now that we know the <u>total</u><u> </u><u>length</u><u> </u><u>we</u><u> </u><u>can</u><u> </u><u>find</u><u> </u><u>the</u><u> </u><u>total</u><u> </u><u>width</u><u>.</u>

See as follows,

103.6 - 78= 25.6

<u>2</u><u> </u><u>widths</u><u>=</u><u> </u><u>25</u><u>.</u><u>6</u>

<u>1</u><u> </u><u>width</u><u>=</u><u> </u><u>25</u><u>.</u><u>6</u><u>÷</u><u>2</u>

<u>=</u><u>12</u><u>.</u><u>8</u><u> </u><u>In</u>

5 0
3 years ago
Simplify (−7.5)(5)(6.2).<br><br> −232.5<br><br> −23.25<br><br> 23.25<br><br> 232.5
PtichkaEL [24]
-7.5 x 5 x 6.2 = -232.5
5 0
3 years ago
Read 2 more answers
What is the midpoint of 10 and 20
erica [24]

Answer:

15

Step-by-step explanation:

Simply subtract the smaller number from the bigger number, and divide by 2. Or add the two numbers together and divide by 2.

6 0
3 years ago
Read 2 more answers
For the hypotheses below test alpha = 0.025 with n = 100 and bar p = 0.67. State
I am Lyosha [343]

Answer:

Part a : Critical value

For this case we want a value of \alpha = 0.025 we need to find on the normal standard distribution a z score that accumulates 0.025 of th area on the left and this value is z_{crit}= -1.96

Part b: Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.67 -0.76}{\sqrt{\frac{0.76(1-0.76)}{100}}}=-2.107  

Part c: Statistical decision  

n \hat p= 100*0.67= 67 >5

n (1-\hat p)= 100*(1-0.67)= 33 >5

So then the normal approximation makes sense.

Since the calculated value is lower than the critical value we have enough evidence to reject the null hypothesis at the significance level provided and we can conclude that the true proportion is lower than 0.76

Step-by-step explanation:

Data given and notation

n=100 represent the random sample taken

\hat p=0.67 estimated proportion of interest

p_o=0.76 is the value that we want to test

\alpha=0.025 represent the significance level

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the true proportion is less than 0.76:  

Null hypothesis:p\geq 0.76  

Alternative hypothesis:p < 0.76  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Part a : Critical value

For this case we want a value of \alpha = 0.025 we need to find on the normal standard distribution a z score that accumulates 0.025 of th area on the left and this value is z_{crit}= -1.96

Part b: Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.67 -0.76}{\sqrt{\frac{0.76(1-0.76)}{100}}}=-2.107  

Part c: Statistical decision  

n \hat p= 100*0.67= 67 >5

n (1-\hat p)= 100*(1-0.67)= 33 >5

So then the normal approximation makes sense.

Since the calculated value is lower than the critical value we have enough evidence to reject the null hypothesis at the significance level provided and we can conclude that the true proportion is lower than 0.76

6 0
4 years ago
Hi another math question please help:)
Mama L [17]

Answer:

1). Yes

2). Yes

3). No

Step-by-step explanation:

1). y = 3

  We can rewrite this equation in the slope-intercept form as,

   y = 0.x + 3

  Here, slope = 0

  y-intercept = 3

  Therefore, it's a linear relation.

  YES.

2). 2x - 5y = 10

   5y = 2x - 10

   y = \frac{2}{5}x-2

   Therefor, it's a linear function.

   YES

3). y = x(x + 3)

   y =x² + 3x

   Since, this equation is a quadratic equation,

   It's not a linear function.

   NO

5 0
3 years ago
Other questions:
  • What's 5 divided by x squared explain
    13·2 answers
  • Perform the indicated operation. -10 + 15 <br><br> -5 <br> 5 <br> 25 <br> -25
    9·1 answer
  • Describe all the numbers that when rounded to the nearest hundred are 12000.
    8·1 answer
  • S(t)=16t^2+32t, how long will it take the ball to fall 79 feet?
    12·1 answer
  • Your typical markup for merchandise is 40%. Your cost on an item is $8.00. Calculate the selling price.
    8·1 answer
  • Which one is the correct answer?
    14·2 answers
  • Matilda is filling a circular section of her porch with colorful pebbles. She knows the diameter of the circular section is 15ft
    14·1 answer
  • DESPERATE WILL GIVE THANKS AND BRAINLSIT
    6·1 answer
  • PLS HELP
    12·1 answer
  • HELPPP PLEASEEEE………..
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!