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
Semenov [28]
3 years ago
13

Two airplanes left the same airport and arrived at the same destination at the same time. The first airplane left at 8:00 a.m. a

nd traveled at an average rate of 496 mph. The second airplane left at 8:30 a.m. and traveled at an average rate of 558 mph. How many hours did it take the first plane to travel to the destination?
Let x represent the number of hours that the first plane traveled.
Enter an equation that can be used to solve this problem in the first box.
Solve for x and enter the number of hours in the second box.
Mathematics
1 answer:
liberstina [14]3 years ago
7 0
First plane: 496x
<span>Second plane:  558( x - 1/2) </span>

<span>Equation: 496x = 558( x - 1/2) </span>

<span>Solving  x = 9/2 ,  or  x = 4.5 hours.

Hope this helps.</span>
You might be interested in
Ashley draws a square that has a diagonal of 15 centimeters. What is the length of one side of the square? Round your answer to
DochEvi [55]
<span>The square is equal so all sides have equal sides. Soooo...

s2 (s squared) + s2 = 15 (squared)

15 x 15 = 225

225/2 = 112.5

Now you just have to get the square root. So go onto ur calculator. Which equals 10.606
</span>
3 0
3 years ago
The statement tan theta -12/5, csc theta -13/5, and the terminal point determined by theta is in quadrant 2."​
Harlamova29_29 [7]

Answer:

Answer C:

Cannot be true because csc(\theta)  is greater than zero in quadrant 2.

Step-by-step explanation:

When the csc of an angle is negative, since the cosecant function is defined as:

csc(\theta)=\frac{1}{sin(\theta)}

that means that the sin of the angle must be negative, and such cannot happen in the second quadrant. The sine function is positive in the first and second quadrant.

Therefore, the correct answer is:

Cannot be true because  csc(\theta)  is greater than zero in quadrant 2.

6 0
3 years ago
Which elements in a set below are integers?12,-3/4,5,-7,2.24,14/7,9
zhuklara [117]

Answer:

12, 5, -7, 14/7, 9

Step-by-step explanation:

Integers are numbers that are either positive or negative and are whole numbers (no decimals).

4 0
3 years ago
Write <br> (−5x)(−5x)(−5x)(−5x)<br> as a power.
Yuliya22 [10]

Answer:

(-5x)^4

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Suppose John is a high school statistics teacher who believes that watching many hours of TV leads to lower test scores. Immedia
Hatshy [7]

This question is incomplete, the complete question is;

Suppose John is a high school statistics teacher who believes that watching many hours of TV leads to lower test scores. Immediately after giving the most recent test, he surveyed each of the 24 students in his class and asked them how many hours of TV they watched that week. He then matched each student's test grade with his or her survey response. After compiling the data, he used hours of TV watched to predict each student's test score. He found the least-squares regression line to be y"  = -1.5x + 85.

He also calculated that the value of r, the correlation, was -0.61.

what is the correct value of the coefficient of determination R² and give a correct interpretation of its meaning

Answer:

Interpretation of coefficient of determination R² = 0.3721

R² = 0.3721, meaning 37.21% of the total variation in test scores can be explained by the least square regression line

Step-by-step explanation:  

Given the data in the question;

the least square regression line is;

y"  = -1.5x + 85

the correlation coefficient r = -0.61

Now, the coefficient of determination R² is square of correlation coefficient r

R² = -61²

R² = 0.3721

8 0
3 years ago
Other questions:
  • PLEASE HELP WITH #4
    10·1 answer
  • What number is the quotient in the division problem below?
    6·2 answers
  • A merchant bought 30 dozen pairs of gloves how many individual gloves did the merchant buy
    5·1 answer
  • What is the reflections over the x- and y-axes
    6·1 answer
  • Using the approximation 3.14 for (pie symbol ​, what is the radius of a circle with a circumference of 59.7
    15·1 answer
  • How to check that a number is divisible by 3 or not?? Need a best shortcut!!
    11·2 answers
  • 1. If f(x) = 9x2 + 5x - 8, then f(-2) = ?
    9·2 answers
  • Use the distributive property to rewrite each expression in it's equivalent form 9a-3/3 ,Just 3 please
    9·1 answer
  • 1+1+2+8+10-36-36%12845+86%29?​
    8·2 answers
  • Find the distance between (−4, −3) and (−2, 0). Round your answer to the nearest tenth.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!