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
Mandarinka [93]
2 years ago
10

Need help ..........​

Mathematics
1 answer:
Scrat [10]2 years ago
5 0
I think this is correct, if not sorry haha-

You might be interested in
Marc ordered a rug he gave a deposit of 30% of the cost and will pay the rest when the rug is delivered if the deposit was $75 h
o-na [289]
Use proportion, so multiply 100 by 75, then divide it by 30 and that's your answer.....250

6 0
3 years ago
Read 2 more answers
Help pls! will give brainliest!<br><br> find the percent markdown of 175.80-141.27
polet [3.4K]

Answer:

141.2/175.8=.803185

1-.803185=.1968=20% markdown

ples give brainliest! :D

8 0
2 years ago
The Earth is 1.49 × 108 kilometers from the Sun, multiply this expression by the given power of 10.
soldier1979 [14.2K]
1.49 × 10^8

*just move the decimal point 8 places to the right.

149,000,000

hope this helps :)



7 0
3 years ago
A cake shop bakes a variety of brownies. the top-selling brownies are ones with toppings of chocolate chip, walnuts, or both. a
sesenic [268]

The probability that they will pick neither the chocolate chip nor the walnut toppings is 0.3

We have

the total of all probabilities is 1.00, or 100%.

In the Venn diagram, we have the probabilities 0.2, 0.4 and 0.1; these sum to

0.2+0.4+0.1 = 0.6+0.1 = 0.7.

This leaves us 1.00-0.7 = 0.3 for the remaining probability of no toppings.

Learn more about Probability:

brainly.com/question/13604758

#SPJ4

6 0
1 year ago
A random sample of 49 measurements from one population had a sample mean of 15, with sample standard deviation 5. An independent
kotykmax [81]

Answer:

Comparing the p value with the significance level \alpha=0.01 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and the difference between the two groups is significantly different.  

Step-by-step explanation:

\bar X_{1}=15 represent the mean for sample 1

\bar X_{2}=18 represent the mean for sample 2

s_{1}=5 represent the sample standard deviation for 1  

s_{f}=6 represent the sample standard deviation for 2  

n_{1}=49 sample size for the group 2  

n_{2}=64 sample size for the group 2  

\alpha=0.01 Significance level provided

t would represent the statistic (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to check if the difference in the population means, the system of hypothesis would be:  

Null hypothesis:\mu_{1}-\mu_{2}=0  

Alternative hypothesis:\mu_{1} - \mu_{2}\neq 0  

We don't have the population standard deviation's, so for this case is better apply a t test to compare means, and the statistic is given by:  

t=\frac{(\bar X_{1}-\bar X_{2})-\Delta}{\sqrt{\frac{s^2_{1}}{n_{1}}+\frac{s^2_{2}}{n_{2}}}} (1)

And the degrees of freedom are given by df=n_1 +n_2 -2=49+64-2=111  

t-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

With the info given we can replace in formula (1) like this:  

t=\frac{(15-18)-0}{\sqrt{\frac{5^2}{49}+\frac{6^2}{64}}}}=-2.897

P value

Since is a bilateral test the p value would be:  

p_v =2*P(t_{111}  

Comparing the p value with the significance level \alpha=0.01 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and the difference between the two groups is significantly different.  

7 0
3 years ago
Other questions:
  • A nut mixture of almonds and cashew nuts at a small fair is $1.00 per pound of almonds and $3.55 per pound of cashew nuts. Over
    12·2 answers
  • An amount of $37,000 is borrowed for 6 years at 5% interest, compounded annually. If the loan is paid in full at the end of the
    13·1 answer
  • X is the midpoint of line vw. Complete the proof that triangle UVX is congruent to triangle UWX
    10·1 answer
  • What is the value of X in the equation below 1/3 12 X -24 equals 16
    13·1 answer
  • HELP please.
    9·1 answer
  • PLEASE HELP IN THE ATTACHED IMAGE
    6·1 answer
  • Keoni has 4 boardshorts and 6 t-shirts. How many days can he wear a different combination of boardshorts and t-shirts? *
    11·1 answer
  • To find the equation of a regression line, ý = ax + b, you need these formulas:
    15·1 answer
  • The points (2,3) and (5,9) are on the line. What is the equation of the line
    14·1 answer
  • I WILL GIVE BRAINLIEST
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!