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
zalisa [80]
2 years ago
5

Help me i need a a 80

Mathematics
2 answers:
oee [108]2 years ago
8 0

Answer:

42n-24

Step-by-step explanation:

multiply the parentheses by 6.

6×7n=42n

6×(-4)= -24

<em><u>answer</u></em><em><u> </u></em><em><u>-</u></em><em><u>></u></em><em><u> </u></em>42n-24

Basile [38]2 years ago
6 0

Answer:

Answer is 42n - 24

Step-by-step explanation:

6×7n = 42n

+6×(-4)=-24

42n-24

You might be interested in
..Urgent.. 600 students attend Ridgewood Junior High School. 10% of students bring their lunch to school everyday. How many stud
zysi [14]

Answer:

Number of student bring their lunch = 60

Step-by-step explanation:

Given:

Total number of student = 600

Student bring their lunch = 10%

Find:

Number of student bring their lunch

Computation:

Number of student bring their lunch = Total number of student x Student bring their lunch

Number of student bring their lunch = 600 x 10%

Number of student bring their lunch = 60

3 0
2 years ago
In a completely randomized experimental design, three brands of paper towels were tested for their ability to absorb water. Equa
arlik [135]

Answer:

Yes. At this significance level, there is evidence to support the claim that there is a difference in the ability of the brands to absorb water.

Step-by-step explanation:

<em>The question is incomplete:</em>

<em>The significance level is 0.05.</em>

<em>The data is:</em>

<em>Brand X: 91, 100, 88, 89</em>

<em>Brand Y: 99, 96, 94, 99</em>

<em>Brand Z: 83, 88, 89, 76</em>

We have to check if there is a significant difference between the absorbency rating of each brand.

Null hypothesis: all means are equal

H_0:\mu_x=\mu_y=\mu_z

Alternative hypothesis: the means are not equal

H_a: \mu_x\neq\mu_y\neq\mu_z

We have to apply a one-way ANOVA

We start by calculating the standard deviation for each brand:

s_x^2=30,\,\,s_y^2=6,\,\,s_z^2=35.33

Then, we calculate the mean standard error (MSE):

MSE=(\sum s_i^2)/a=(30+6+35.33)/3=71.33/3=23.78

Now, we calculate the mean square between (MSB), but we previously have to know the sample means and the mean of the sample means:

M_x=92,\,\,M_y=97,\,\,M_z=84\\\\M=(92+97+84)/3=91

The MSB is then:

s^2=\dfrac{\sum(M_i-M)^2}{N-1}\\\\\\s^2=\dfrac{(92-91)^2+(97-91)^2+(84-91)^2}{3-1}\\\\\\s^2=\dfrac{1+36+49}{2}=\dfrac{86}{2}=43\\\\\\\\MSB=ns^2=4*43=172

Now we calculate the F statistic as:

F=MSB/MSE=172/23.78=7.23

The degrees of freedom of the numerator are:

dfn=a-1=3-1=2

The degrees of freedom of the denominator are:

dfd=N-a=3*4-3=12-3=9

The P-value of F=7.23, dfn=2 and dfd=9 is:

P-value=P(F>7.23)=0.01342

As the P-value (0.013) is smaller than the significance level (0.05), the null hypothesis is rejected.

There is evidence to support the claim that there is a difference in the ability of the brands to absorb water.

3 0
3 years ago
(Give Brainliest)need ASAP
cupoosta [38]

Answer:

the answer is 1/2

Step-by-step explanation:

Mean is add up all the numbers and divide by how many numbers there is, so -(2+5-10+15)/4, which is 2/4 or 1/2 plz mark brainliest hope this helps

3 0
2 years ago
Please I need help I’m giving 20 points for the answer please
strojnjashka [21]

Answer:

I would answer but in your question you said you are giving away 20 points when you are only giving away 15.... Make sure to state facts only.


Step-by-step explanation:

I'll answer anyways.....

You can make 0 different triangles. The angles/points would never line up right to make a triangle. Sorry if I'm wrong but I'm pretty sure this is right.

*If this helped Plz mark Brainliest*


3 0
3 years ago
What is 37 years converted into hours?
natta225 [31]
There are 24 hrs in a day, and there are 365 days in an year

first step: multiply years with days

37 x 365 = 13505 days in all

second step: multiply days with hrs

13505 x 24 = 324120 hrs

your total is 324120 hrs

hope this helps
6 0
3 years ago
Read 2 more answers
Other questions:
  • A red die, a blue die, and a yellow die (all six sided) are rolled. we are interested in the probability that the number appeari
    9·1 answer
  • The two functions below are used to represent the height of a rocket above the ground after it is launched. Which rocket reaches
    11·2 answers
  • LMNP is a rectangle. Find the value of x and the length of each diagonal. LN=6x+9and MP=9x−6
    15·1 answer
  • Translate to an algebraic expression the sum of D and F is
    14·1 answer
  • ((I will give brainy and 20 points to the first person who answers correctly!))
    11·1 answer
  • What is the value of x in the equaton<br><img src="https://tex.z-dn.net/?f=%20%7B25%7Dx%5E%7B2%7D%20%3D%2016" id="TexFormula1" t
    13·1 answer
  • What is the slope of a line parallel to a line whose equation is 4y-6y=15
    13·1 answer
  • Which of the following functions has an inverse that is not a function? y = x y = 2x + 1 y = x²
    8·1 answer
  • Function f is shown on the graph. What is the range of f?
    13·1 answer
  • Factor this polynomial completely.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!