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
puteri [66]
3 years ago
10

20 points and Brainliest if answered and explained!

Mathematics
1 answer:
Rasek [7]3 years ago
6 0
What you need to know for this case is that the sum of the internal angles of a triangle is 180 °
 We then have the following equation that is given by:
 (2x) + (3x) + (4x) = 180
 Clearing x we have:
 9x = 180
 x = 180/9
 x = 20
 Therefore we have:
 m∠A = (40) °
 m∠B = (60) °
 m∠C = (80) °
 Answer:
 B) m∠B = 60 °
You might be interested in
Question 7 / 18
Salsk061 [2.6K]
Answer : A Eugene Talmadge
8 0
3 years ago
What is the sum of the fractions? Use the number line to help find the answer.
natali 33 [55]
Answer is - 4 over 5
4 0
3 years ago
HELP ASAP<br> 1.A term that is a known number without variables. is called?
Natali5045456 [20]

Answer:

constants

Step-by-step explanation:

Constants are the terms in the algebraic expression that contain only numbers. That is, they're the terms without variables. We call them constants because their value never changes, since there are no variables in the term that can change its value.

7 0
3 years ago
Directions for questions 4 &amp; 5: We selected a random sample of 100 StatCrunchU students, 67 females and 33 males, and analyz
GaryK [48]

Answer:

The 95% confidence interval for the difference between means is (-2164.21, -299.13).

The lower limit on the confidence interval is -$2164.21.

The upper limit on the confidence interval is -$299.13.

Step-by-step explanation:

The sample data is:

Gender   Mean          Std. dev.     n

Female    2577.75      1916.29     67

Male        3809.42     2379.47     33

We have to calculate a 95% confidence interval for the difference between means, with a T-model.

The sample 1, of size n1=67 has a mean of 2577.75 and a standard deviation of 1916.29.

The sample 2, of size n2=33 has a mean of 3809.42 and a standard deviation of 2379.47.

The difference between sample means is Md=-1231.67.

M_d=M_1-M_2=2577.75-3809.42=-1231.67

The estimated standard error of the difference between means is computed using the formula:

s_{M_d}=\sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma_2^2}{n_2}}=\sqrt{\dfrac{1916.29^2}{67}+\dfrac{2379.47^2}{33}}\\\\\\s_{M_d}=\sqrt{54808.468+171572.045}=\sqrt{226380.513}=475.795

The t-value for a 95% confidence interval is t=1.96.

The margin of error (MOE) can be calculated as:

MOE=t\cdot s_M=1.96 \cdot 475.795=932.54

Then, the lower and upper bounds of the confidence interval are:

LL=M_d-t \cdot s_{M_d} = -1231.67-932.54=-2164.21\\\\UL=M_d+t \cdot s_{M_d} = -1231.67+932.54=-299.13

The 95% confidence interval for the difference between means is (-2164.21, -299.13).

6 0
3 years ago
Which of the following is a valid probability distribution? A 2-column table labeled Probability Distribution A has 4 rows. The
Ksenya-84 [330]

Answer:

i think its D on edg

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is a true statement for this function?
    10·1 answer
  • Help please I don’t understand this question
    14·1 answer
  • Kathy bought some fruit to eat with her breakfast this week. She bought 2 peaches, 3 plums, 1 banana, and 1 apple. Without looki
    8·1 answer
  • The graph of a proportional relationship passes through the points (15,3) and (5,y) find y
    10·2 answers
  • Reema made 10 muffins. Her parents ate 1/2 of the muffins. Her brother ate 1/5 of the muffins. Her sister ate 1/10 of the muffin
    8·1 answer
  • I think I know what this is answer it pls so I can make sure I’m rigt
    6·1 answer
  • Sales tax is 6% and you spend $42. How much money will you spend on tax?
    9·2 answers
  • Ben also participated. He fell down midway, and had to walk part of the distance. Still, he finished the distance! It took him e
    15·1 answer
  • How many turning points can a polynomial with a degree of 7 have
    15·2 answers
  • How to solve problems with positive and negative numbers​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!