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
mel-nik [20]
3 years ago
13

Which pair of angles is complementary?

Mathematics
1 answer:
NNADVOKAT [17]3 years ago
4 0

Answer:

2 angles are shown one angle is 56 degrees and the other is 34 degrees

Step-by-step exp

complementary angle=90 degree

56+34=90

You might be interested in
Brainliest for best answer
pickupchik [31]

Answer:

1. 120, 2. 6, 3. 21

Step-by-step explanation:

7 0
3 years ago
Find c.
lesantik [10]

Answer:

C=1 ft

Step-by-step explanation:

c2= a2 + b2 - 2ab

= 8^(2) + 7^(2) - 2(8)(7)

= 113 -112

c2= 1 put a square root on c2 and 1

c = 1

3 0
3 years ago
Please help. Find tanX
Kruka [31]

Answer:

32/24

Step-by-step explanation:

opposite/ adjacent

5 0
3 years ago
Read 2 more answers
#10 i The table shows the admission costs (in dollars) and the average number of daily visitors at an amusement park each the pa
lions [1.4K]

The line of best fit is a straight line that can be used to predict the

average daily attendance for a given admission cost.

Correct responses:

  • The equation of best fit is; \underline{ \hat Y = 1,042 - 4.9 \cdot X_i}
  • The correlation coefficient is; r ≈<u> -0.969</u>

<h3>Methods by which the line of best fit is found</h3>

The given data is presented in the following tabular format;

\begin{tabular}{|c|c|c|c|c|c|c|c|c|}Cost, (dollars), x&20&21&22&24&25&27&28&30\\Daily attendance, y&940&935&940&925&920&905&910&890\end{array}\right]

The equation of the line of best fit is given by the regression line

equation as follows;

  • \hat Y = \mathbf{b_0 + b_1 \cdot X_i}

Where;

\hat Y = Predicted value of the<em> i</em>th observation

b₀ = Estimated regression equation intercept

b₁ = The estimate of the slope regression equation

X_i = The <em>i</em>th observed value

b_1 = \mathbf{\dfrac{\sum (X - \overline X) \cdot (Y - \overline Y) }{\sum \left(X - \overline X \right)^2}}

\overline X = 24.625

\overline Y = 960.625

\mathbf{\sum(X - \overline X) \cdot (Y - \overline Y)} = -433.125

\mathbf{\sum(X - \overline X)^2} = 87.875

Therefore;

b_1 = \mathbf{\dfrac{-433.125}{87.875}} \approx -4.9289

Therefore;

  • The slope given to the nearest tenth is b₁ ≈ -4.9

b_0 = \mathbf{\dfrac{\left(\sum Y \right) \cdot \left(\sum X^2 \right) - \left(\sum X \right) \cdot \left(\sum X \cdot Y\right)} {n \cdot \left(\sum X^2\right) - \left(\sum X \right)^2}}

By using MS Excel, we have;

n = 8

∑X = 197

∑Y = 7365

∑X² = 4939

∑Y² = 6782675

∑X·Y = 180930

(∑X)² = 38809

Therefore;

b_0 = \dfrac{7365 \times 4939-197 \times 180930}{8 \times 4939 - 38809} \approx \mathbf{1041.9986}

  • The y-intercept given to the nearest tenth is b₀ ≈ 1,042

The equation of the line of best fit is therefore;

  • \underline{\hat Y = 1042 - 4.9 \cdot X_i}

The correlation coefficient is given by the formula;

\displaystyle r = \mathbf{\dfrac{\sum \left(X_i - \overline X) \cdot \left(Y - \overline Y \right)}{ \sqrt{\sum \left(X_i - \overline X \right)^2 \cdot \sum \left(Y_i - \overline Y \right)^2} }}

Where;

\sqrt{\sum \left(X - \overline X \right)^2 \times \sum \left(Y - \overline Y \right)^2}  = \mathbf{446.8121}

\sum \left(X_i - \overline X \right) \times \left(Y - \overline Y\right) = \mathbf{-433.125}

Which gives;

r = \dfrac{-433.125}{446.8121}  \approx \mathbf{-0.969367213}

The correlation coefficient given to the nearest thousandth is therefore;

  • <u>Correlation coefficient, r ≈ -0.969</u>

Learn more about regression analysis here:

brainly.com/question/14279500

7 0
3 years ago
The sum of two numbers, x and y, is 12. The difference of x and two times y is 6. What are the values of x and y?
Aleksandr-060686 [28]
The answer is: x = 10, y = 2

Leave a thanks because your welcome :)

Work:

x + y = 12
(10) + (2)+  = 12
Correct

x - 2y = 6
(10) - 2(2) = 6
10 - 4 = 6
Correct
8 0
3 years ago
Other questions:
  • I'm trying to find the standard form for 8.97x10 to rh negative 1. Can you helpe?
    7·1 answer
  • What is 42/49 simplified
    10·2 answers
  • Lily estimated a quotient of 120 and found an actual quotient of 83 what should she do next
    12·1 answer
  • If function g is defined by the equation y − 3x = -14, which equation represents the function in function notation?
    5·1 answer
  • Draw a square that has a circumference of 12 cm.
    14·1 answer
  • What is 5×10 to the power of -3 in as ordinary number
    5·1 answer
  • A pitcher has 8 pints of juice, and another pitcher has 12 cups of milk. How many more cups of juice are there than milk
    7·1 answer
  • An arts academy requires there to be 5 teachers for every 90 students and 3 tutors for every 30 students. How many students does
    8·1 answer
  • Pls help ASAP I’ll brainlest
    14·2 answers
  • Help me please I’m really struggling
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!