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
Rashid [163]
4 years ago
8

PLEASE HELP ASAP WILL GIVE BRAINLIEST AND A LOT OF POINTS !!!!!!

Mathematics
2 answers:
expeople1 [14]4 years ago
7 0

<a = 90°                              (right angle)

<b = 90°  - 59°  = 31°          (complementary angles)

<c = 180°  - 59°  = 121°        (supplementary angles)

<d = 59°                              (vertical angles)

motikmotik4 years ago
6 0

Answer:

a =90

b = 31

c = 121

d =59

Step-by-step explanation:

Angle a is a right angle = 90 degrees.  The corner box means that it equals 90 degrees

a = 90

Angles b and 59 are complementary

The equal 90 degrees since angle a is a right angle and the three angles make a straight line

a+b+ 59 = 180 and a is 90

so b+59 = 90  (which means they are complementary)

Subtract 59 from each side

b+59-59 = 90-59

b = 31

Angle c and 59 are supplementary

They form a straight line or 180

c+59 = 180

Subtract 59 from each side

c+59-59= 180-59

c =121

Angle c and d are complementary  (they form a straight line)

c+d = 180

Since c is 121

121+d = 180

Subtract 121 from each side

121-121+d =180-121

d = 59

You might be interested in
A piano teacher has 4 1/2 hours available to teach in a night. Each lesson will last 1 1/2 hours. How many lessons can the teach
kherson [118]

Answer:

3 classes

Step-by-step explanation:

The teacher can schedule 3 classes in a night because 4 1/2 divided by 1 1/2 is 3.

hope this helps!!

8 0
3 years ago
Read 2 more answers
The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airp
motikmotik

Answer:

The 95% confidence interval for the population mean rating is (5.73, 6.95).

Step-by-step explanation:

We start by calculating the mean and standard deviation of the sample:

M=\dfrac{1}{n}\sum_{i=1}^n\,x_i\\\\\\M=\dfrac{1}{50}(6+4+6+. . .+6)\\\\\\M=\dfrac{317}{50}\\\\\\M=6.34\\\\\\s=\sqrt{\dfrac{1}{n-1}\sum_{i=1}^n\,(x_i-M)^2}\\\\\\s=\sqrt{\dfrac{1}{49}((6-6.34)^2+(4-6.34)^2+(6-6.34)^2+. . . +(6-6.34)^2)}\\\\\\s=\sqrt{\dfrac{229.22}{49}}\\\\\\s=\sqrt{4.68}=2.16\\\\\\

We have to calculate a 95% confidence interval for the mean.

The population standard deviation is not known, so we have to estimate it from the sample standard deviation and use a t-students distribution to calculate the critical value.

The sample mean is M=6.34.

The sample size is N=50.

When σ is not known, s divided by the square root of N is used as an estimate of σM:

s_M=\dfrac{s}{\sqrt{N}}=\dfrac{2.16}{\sqrt{50}}=\dfrac{2.16}{7.071}=0.305

The degrees of freedom for this sample size are:

df=n-1=50-1=49

The t-value for a 95% confidence interval and 49 degrees of freedom is t=2.01.

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

MOE=t\cdot s_M=2.01 \cdot 0.305=0.61

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

LL=M-t \cdot s_M = 6.34-0.61=5.73\\\\UL=M+t \cdot s_M = 6.34+0.61=6.95

The 95% confidence interval for the mean is (5.73, 6.95).

4 0
4 years ago
Find slope of the line -12x+13y=-6
Burka [1]

Answer: 2 x - 3 y = 6 i think but let let me know if i'm wrong

7 0
3 years ago
What greatest common factors <br>go into 12
Vladimir79 [104]

The greatest commons factors are for 12 is 1,2,3,4,6,12 because 2 × 6 = 12, or 4 × 3 = 12, or 1 × 12 = 12 hope that help!

6 0
4 years ago
Read 2 more answers
Solve the system of equations given below.
Yuri [45]

Answer:

C. (-1, 10)

Step-by-step explanation:

{5 = 10 - 5 ☑

{−20 = 1 - 21 ☑

This is what you will get when you plug these coordinates into the system of equations.

I am joyous to assist you anytime.

4 0
3 years ago
Other questions:
  • Help me I need to pass so I can go on to the next thing plz someone help me​
    9·1 answer
  • Abby can buy an 8 pound of dog food for 7.40 or a 4 pound bag of the same dog food for 5.38. Which is the better buy
    5·1 answer
  • What is true about rotations ?
    12·1 answer
  • In a survey of 1900 people who owned a certain type of car, 665 said they would buy that type of car again. What percent of the
    12·1 answer
  • Mark is in training for a marathon race. He has been training by running 10 miles each day. He will be increasing his running by
    9·1 answer
  • How do you work the problem 698 divided by 2
    7·2 answers
  • Is this right? Please help me
    13·2 answers
  • Identify characteristics of the quadratic function and its graph ​
    12·1 answer
  • Jayda takes her dog Rolo to obedience training once each week. Jayda bought a box of 96 dog treats and split them evenly into b
    8·1 answer
  • Avery had $25.19 in her wallet. If she bought lunch with 7 &amp; dollars from her wallet, how much money did she have in her wal
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!