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
Lostsunrise [7]
3 years ago
14

If Sam has 40 candy bars and Jack steals 12 how much candy bars does Sam have left?

Mathematics
2 answers:
AveGali [126]3 years ago
8 0

Answer:

Sam has 40 candy bars

jack steals 12 right

to find how much is left for Sam, we will have to subtract Sam's 40 from the stolen 12

40-12

=28

therefore Sam has 28 candy bars left

Step-by-step explanation:

kiruha [24]3 years ago
3 0

Answer:

17

Step-by-step explanation:

You might be interested in
A sample of 1200 computer chips revealed that 45% of the chips fail in the first 1000 hours of their use. The company's promotio
yaroslaw [1]

Answer:

z=\frac{0.45 -0.48}{\sqrt{\frac{0.48(1-0.48)}{1200}}}=-2.08

p_v = P(Z

So the p value obtained was a low value and using the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the proportion of chips that fail in the first 1000 hours of their use is not significantly less than 0.48.   

Step-by-step explanation:

Data given and notation

n=1200 represent the random sample taken

\hat p=0.45 estimated proportion of chips that fail in the first 1000 hours of their use

\mu_0 =0.48 is the value that we want to test

\alpha=0.05 represent the significance level

Confidence=95% or 0.95

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 si less then 0.48:  

Null hypothesis:p\geq 0.48  

Alternative hypothesis:p < 0.48  

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  is significantly different from a hypothesized value .

Calculate the statistic  

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

z=\frac{0.45 -0.48}{\sqrt{\frac{0.48(1-0.48)}{1200}}}=-2.08

Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The significance level provided \alpha=0.05. The next step would be calculate the p value for this test.  

Since is a left tailed test the p value would be:  

p_v = P(Z

So the p value obtained was a low value and using the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the proportion of chips that fail in the first 1000 hours of their use is not significantly less than 0.48.  

6 0
3 years ago
Solve. 90<img src="https://tex.z-dn.net/?f=x" id="TexFormula1" title="x" alt="x" align="absmiddle" class="latex-formula"> = 27.
Irina-Kira [14]

Answer: x≈0.732

Step-by-step explanation:

You need to find the value of the variable "x".

To solve for "x" you need to apply the following property of logarithms:

log(m)^n=nlog(m)

Apply logarithm on both sides of the equation:

90^x=27\\\\log(90)^x=log(27)

Now, applying the property mentioned before, you can rewrite the equation in this form:

xlog(90)=log(27)

Finally, you can apply the Division property of equality, which states that:  

 If\ a=b,\ then\ \frac{a}{c}=\frac{b}{c}

Therefore, you need to divide both sides of the equation by log(90). Finally, you get:

\frac{xlog(90)}{log(90)}=\frac{log(27)}{log(90)}\\\\x=\frac{log(27)}{log(90)}

x≈0.732

7 0
3 years ago
Select the fraction that is equivalent to one sixth.
maria [59]
Two twelfths that is the answer
4 0
2 years ago
Read 2 more answers
PLEASE PLEASE HELP I DON'T UNDERSTAND AND IT'S DUE TMRW
zmey [24]

The answer to the above math expression is . See the computation below.

<h3>What is the calculation justifying the above?</h3>

First we solve for the numerator. The numerator is:

7√2 - 2√16

Where:

7√2 = 9.89949493661; and

2√16 = 8

Hence,

7√2 - 2√16 = 1.89949493661

Next we solve for the denominator. This is given as:

3√8=8.48528137424

Hence,

(7√2 - 2√16)/3√8 = 1.89949493661/8.48528137424

= 0.22385762508

$\approx$ 0.224

Learn more about math expressions:

brainly.com/question/4344214

#SPJ1

5 0
2 years ago
If necessary, use / for the fraction bar. Please reduce to simplest terms
Setler [38]

Answer:

the answer is probably 3/5 since its the starting one so it will be how t started

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • The original vertices of a quadrilateral are (-2,3), (4,6), (4,2), and (3, -2). After a transformation, the new coordinates are
    11·1 answer
  • Subtract these polynomials
    5·2 answers
  • Hector wants to save $375 for an iphone 6. He has saved $180 so far. How much more dose he need?
    9·1 answer
  • Answer the question in the picture
    10·1 answer
  • WHOEVER ANSWERS CORRECT WILL GET BRAINLIST
    15·1 answer
  • What is the area of a sector with a central angle of 255 and a radius of 18.4 m?
    8·1 answer
  • if a stereo is sold for $59.99, and Karen pays $64.14 for it when she checks out, what is the sale tax in the area
    7·2 answers
  • I need help! Question is in the picture!
    6·2 answers
  • 25x2 + 36 <br>25x2 - 36 = <br>25x2 + 60x + 36=​
    8·1 answer
  • 8^-1*5^3/2^-4<br> Pls answer
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!