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
otez555 [7]
3 years ago
6

I am not sure if this is right can someone check it ASAP please

Mathematics
1 answer:
NikAS [45]3 years ago
6 0

Answer:

x=10

Step-by-step explanation:

3(4x-12) = 84

Divide each side by 3

3/3(4x-12) = 84/3

4x-12 =28

Add 12 to each side

4x-12+12 = 28+12

4x= 40

Divide each side by 4

4x/4 = 40/4

x = 10

You might be interested in
Use <, >, or = to compare the following decimals.
TEA [102]

Answer:

A is >

B is >

C is =

I hope this helps you.

7 0
3 years ago
Plz help, answer the question below
Afina-wow [57]

\sqrt[6]{x^{16}} =\sqrt[6]{x^{12} \cdot x^{4}}=x^2\sqrt[6]{x^{4}}

5 0
3 years ago
Leah decided to paint some of the rooms at her 51 room hotel. She needs 1/5 of a can to paint per room.if Leah had 6 cans of pai
enyata [817]
If 1/5 can for 1 (each) room, then:
for 51 rooms, (51*1/5)=10.2 rooms.
Round to nearest whole number since you can't just paint 0.2 of a room: answer = 10
5 0
3 years ago
Read 2 more answers
A line that includes the points ( - 2, - 9) and ( - 6,n) has a slope of - 1. What is the value of n?
Genrish500 [490]

Write out the slope formula:

m = (change in y) / (change in x)

Here,

m = n-(-9) / (-6-(-2)) = (n+9 / (-4)

Now set this slope equal to -1 and solve the resulting equation for n:

(n+9) / (-4) = - 1, or   (n+9) / 4 = 1, or n+9 = 4.  Then n = -5.

7 0
3 years ago
Suppose that we want to test the hypothesis with a significance level (alpha) of .05 that the climate has changed since industri
saw5 [17]

Answer: we reject the initial claim

(50. 3802, 51.6198)

Step-by-step explanation:

A)

The initial statement is that the mean temperature throughout history is 50°

This is the null hypothesis and it is denoted as H'

H': u = 50.

After taking a sample of 40 years, we realized that the mean temperature is 51°.

This is the alternative hypothesis, in contradiction to the alternative.

The alternative hypothesis is denoted as H1

H1: u > 50 ( upper tailed).

Sample size (n) = 40

Sample mean (x) = 51

Population standard deviation (σ) = 2

We use a z test to get the value of the test statistics.

We are using a z test because sample size is greater than 30 ( n = 40) and population standard deviation is given.

Z score = x - u/ (σ/√n)

Z score = 51 - 50 / (2/√40)

Z score = 1 / 0.3162

Z score = 3.16

Our level of significance is 5%, and the critical value at this level of significance is 1.645.

By comparing the z score relative to the critical value, since our z score is greater than 1.645, it implies that we are in the rejection region hence we reject the initial claim.

B)

We are to construct a 95% confidence interval for population mean temperature.

For upper limit

u = x + Zα/2 ×(σ/√n)

Where Zα/2 = 1.96 which is the critical value for a two tailed test at 5% level of significance.

For upper limit, we have that

u = 51 + 1.96 × (2/√40)

u = 51 + 1.96 (0.3162)

u = 51 + 0.6198

u = 51.6198.

For lower limit, we have that

u = 51 - 1.96 × (2/√40)

u = 51 - 1.96 (0.3162)

u = 51 - 0.6198

u = 50. 3802.

Hence the 95% confidence level for mean temperature is given as (50. 3802°, 51.6198°)

7 0
3 years ago
Other questions:
  • In fgh, mf = 50, mg= 60, and mh =70 which side of fgh is the shortest
    8·1 answer
  • The legs of a right triangle are 18 centimeters and 80 centimeters long. What is the length of the hypotenuse? (4 points)
    14·1 answer
  • The function g(x) = 2^x. the function f(x) = 2^x+k and k< 0. which of the following statements is true.
    7·2 answers
  • Need answers ASAP
    14·1 answer
  • Please Help,
    10·2 answers
  • A prism is filled with 60 cubes with 1/2 unite side length
    13·1 answer
  • Can someone helpp with thissssssssssssssss
    10·1 answer
  • Plsss need help now. Will give brainliest :) ​
    12·1 answer
  • A local gym charges customers $20 for the first month
    6·1 answer
  • In July 2005, the journal Annals of Internal Medicine published a report on the reliability of HIV testing. Results of a large s
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!