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
Dafna1 [17]
2 years ago
12

Please answer!!!!!!!!!!!!

Mathematics
1 answer:
vagabundo [1.1K]2 years ago
6 0

Answer:

x = 14

A = 38

B = 71

C = 71

Step-by-step explanation:

3x-4 + 5x + 1 + 7x-27 = 180

15x-30 = 180

15x = 180 + 30

15x = 210

x = 210/15

x = 14

A = 3x-4 = 3(14) - 4 = 38

B = 5x + 1 = 5(14) + 1 = 70 + 1 = 71

C = 7x - 27 = 7(14) - 27 = 98-27 = 71

You might be interested in
I need help with subtracting these
Solnce55 [7]
I'm sorry for my earlier mistake! The answer is -5-5/3=<span>-20/3</span>
3 0
2 years ago
Read 2 more answers
Expand and simplify (y-3)³​
Tanya [424]

Answer:

Expanded: (y-3)(y-3)(y-3)

Simplified:  y^{3}-9y^{2}+27y-27

Step-by-step explanation:

Expanded: (y-3)(y-3)(y-3)

Simplified:

y^{2} -3y-3y+9(y-3)\\y^{2} -6y+9(y-3)

y^{3} -3y^{2}-6y^{2}  +18y+9y-27

y^{3}-9y^{2} +27y-27

5 0
3 years ago
A professor would like to test the hypothesis that the average number of minutes that a student needs to complete a statistics e
professor190 [17]

Answer:

\chi^2 =\frac{15-1}{25} 16 =8.96

The degrees of freedom are given by:

df = n-1 = 15-1=14

The p value for this case would be given by:

p_v =P(\chi^2

Since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviation is not ignificantly lower than 5 minutes

Step-by-step explanation:

Information given

n=15 represent the sample size

\alpha=0.05 represent the confidence level  

s^2 =16 represent the sample variance

\sigma^2_0 =25 represent the value that we want to  verify

System of hypothesis

We want to test if the true deviation for this case is lesss than 5minutes, so the system of hypothesis would be:

Null Hypothesis: \sigma^2 \geq 25

Alternative hypothesis: \sigma^2

The statistic is given by:

\chi^2 =\frac{n-1}{\sigma^2_0} s^2

And replacing we got:

\chi^2 =\frac{15-1}{25} 16 =8.96

The degrees of freedom are given by:

df = n-1 = 15-1=14

The p value for this case would be given by:

p_v =P(\chi^2

Since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviation is not ignificantly lower than 5 minutes

6 0
3 years ago
I’m new to this app!<br> And i really need help..<br> PLEASE HELP!!!!!
aalyn [17]

Step-by-step explanation:

a) x^2 - 5x + 4 = (x - 1)(x - 4)

b) x^2 - 10x + 9 = (x - 1)(x - 9)

c) x^2 - 16x + 64 = (x - 8)^2

8 0
2 years ago
(giving brainiest and thanks on the answer and question if correct!
liraira [26]

Answer:

it is option A

Step-by-step explanation:

4 0
2 years ago
Other questions:
  • WILL GIVE BRAINLEST SUPER EASY A coyote can run up to 43 miles per hour while a rabbit can run up to 35 per hour. Write two equi
    7·1 answer
  • A store has a outfit that is $35.00 and 50% of what is the price now.
    14·2 answers
  • Find the volume of the given prism. Round to the nearest tenth if necessary.
    7·2 answers
  • Solve for theta sin θ/2 − cos θ = 0
    8·1 answer
  • Ndelaria estimates that the drama club sold 400 tickets to the school play. The
    9·1 answer
  • The longest side of a triangle is 34 degree the measures of the triangle are 40 and 65. Find the lengths of the other two sides
    5·2 answers
  • The height of a seat on a Ferris wheel can be modeled as H (t) = 48 sin (pi/30 t+ 3pi/2) + 53, where tis time in seconds and H(t
    8·1 answer
  • The graph shows the distance, in miles, that Anders traveled over a period of nine hours. Use the graph to determine the constan
    14·1 answer
  • What is 4 divided by 5/9 equaled to ?
    6·2 answers
  • Find length indicated
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!