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
Allushta [10]
3 years ago
9

Can someone please help me solve this and if u have any questions text me don’t comment

Mathematics
1 answer:
Valentin [98]3 years ago
4 0

Answer:

x = 4

Step-by-step explanation:

Sum of angles (in degrees) in a triangle = 180

so

60 + 70 + 12x + 2 = 180

Add like terms

132 + 12x = 180

subtract 132 from both sides

12x = 48

divide both sides by 12

x = 4

You might be interested in
Drag each tile to the correct box.<br>Order the expressions from least value to greatest value.<br>​
STatiana [176]

Answer:

-2 19/20, 2 3/5. 3.125, 10.35

Step-by-step explanation:

Let's solve each expression:

Solve:

-4.5 x -2.3

Multiply:

-4.5 x -2.3

10.35

Therefore, the simplified expression is 10.35

Solve:

5/-1.6

Divide:

5/-1.6

3.125

Therefore, the simplified expression is 3.125

Solve:

5 6/15 + (-2 4/5)

First, make the denominators of 4/5 equal to 15:

4/5 = ?/15

Multiply both the numerator and denominator by 3:

4 x 3 = 12

5 x 3 = 15

The new fraction is 12/15.

Add:

5 6/15 + (-2 12/15)

2 9/15

Simplify:

2 9/15 = 2 3/5

(divide the numerator and denominator by 3)

Therefore, the simplified expression is 2 and three-fifths.

Solve:

-3 3/10 - (-7/20)

First, make the denominators of 3/10 equal to 20:

3/10 = ?/20

Multiply both the numerator and denominator by 2:

3 x 2 = 6

10 x 3 = 20

The new fraction is 6/20.

Subtract:

-3 6/20 - (-7/20)

-2 19/20

Therefore, the simplified expression is negative 2 and nineteen-twentieths.

Order from least to greatest:

-2 19/20, 2 3/5. 3.125, 10.35

3 0
2 years ago
Bones Brothers &amp; Associates prepare individual tax returns. Over prior years, Bones Brothers have maintained careful records
madreJ [45]

Answer:

For this case we have the following info related to the time to prepare a return

\mu =90 , \sigma =14

And we select a sample size =49>30 and we are interested in determine the standard deviation for the sample mean. From the central limit theorem we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And the standard deviation would be:

\sigma_{\bar X} =\frac{14}{\sqrt{49}}= 2

And the best answer would be

b. 2 minutes

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".

Solution to the problem

For this case we have the following info related to the time to prepare a return

\mu =90 , \sigma =14

And we select a sample size =49>30 and we are interested in determine the standard deviation for the sample mean. From the central limit theorem we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And the standard deviation would be:

\sigma_{\bar X} =\frac{14}{\sqrt{49}}= 2

And the best answer would be

b. 2 minutes

3 0
3 years ago
I need help with this question.
ahrayia [7]

Answer:

59

Step-by-step explanation:

We know that all the angles must add up to 180

so we have

38+2b-20+b-15=180

solve for b

3b+3=180

3b=177

b=59

8 0
2 years ago
Read 2 more answers
The base is 3 and the height is 2 what is the area of the triangle
Scorpion4ik [409]

Answer:

area = 3

Step-by-step explanation:

area of a triangle = 1/2 base x height

1/2 x 3 x 2 = 1/2 x 6 = 3

6 0
2 years ago
Which shape could not be a cross section for this cube?
brilliants [131]

Answer:

C) Octagon

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Rectangular Washington County measures 15.9 miles by 9.1 miles what is the county's area
    8·2 answers
  • Joel has d dimes and q quarters with a total value of $25.50. Which equation represents the total amount in dollars in terms of
    14·1 answer
  • The centroid of a triangle is found by constructing the _____.
    6·2 answers
  • Find an equation of the line through (4,5) and parallel to y=3x+5.  
    6·1 answer
  • Please help meeee!!!!The domain (input values) of the sine function is:
    14·2 answers
  • Can you help me asap please
    9·1 answer
  • Solv for x,y,and z brainliest
    13·1 answer
  • Data plays a crucial role in decision-making because it can reveal relationships between different quantities. We often use line
    13·2 answers
  • there were 138 students and 32 adults at a concert if 85% of the seats were filled how many seats are in the auditorium round yo
    13·1 answer
  • Find x and y. <br><br> pls pls help
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!