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
Greeley [361]
3 years ago
9

What do the double brackets with an x in the middle mean?

Mathematics
1 answer:
borishaifa [10]3 years ago
8 0
That is an absolute value. (the accual magnitude of a numerical number) it look like a v when graphed.
You might be interested in
Literally noone answers my questions please help
prohojiy [21]

Answers:

  • slower train = 139 km per hour
  • faster train = 159 km per hour

=================================================

Explanation:

x = rate of the slower train

x+20 = rate of the faster train

rates are in km per hour, abbreviated as kph

The train traveling at x kph will travel 5x km after 5 hours.

Use this formula

distance = rate*time

Using that same formula, the faster train travels 5(x+20) = 5x+100 kilometers in 5 hours.

The two distances must add to 1490 if we want the trains to pass by each other. Assume that the trains are traveling on parallel side-by-side tracks.

--------------------------

So,

(slower train distance) + (faster train distance) = 1490

(5x) + (5x+100) = 1490

10x+100 = 1490

10x = 1490-100

10x = 1390

x = 1390/10

x = 139

The slower train moves at a rate of 139 km per hour.

x+20 = 139+20 = 159

The faster train moves at a speed of 159 km per hour.

--------------------------

Check:

The slower train travels 139 kph and travels for 5 hours, so it covers a distance of 139*5 = 695 km

The faster train has a speed of 159 kph and travels for 5 hours, so it covers 159*5 = 795 km

Total distance = 695+795 = 1490

The answers are confirmed.

7 0
2 years ago
Help solve 4 and 5 please
Sloan [31]

Answer:

Step-by-step explanation:

4). a). If the diagonals of a parallelogram are congruent, then it must be a RECTANGLE.

b). If the diagonals of a parallelogram are perpendicular, then it must be a SQUARE.

c). If the diagonals of a parallelogram bisect the angles of the parallelogram, then it must be a RHOMBUS.

d). If the diagonals of a parallelogram are perpendicular and congruent, then it must be a SQUARE.

e). If a parallelogram has four congruent sides, then it must be a SQUARE.

5). Given quadrilateral SELF is a rhombus.

a). All sides of a rhombus are equal,

   Therefore, ES = EL = 25

b). Diagonals of a rhombus bisects the opposite angles,

   Therefore, m∠ELS = m∠FLS

    3x - 2 = 2x + 7

    3x - 2x = 7 + 2

    x = 9

c). Diagonals of the rhombus bisect the opposite angles, and adjacent angles are supplementary.

m∠ELF = 2(m∠ELS) = 2(2y - 9)

m∠LES = 2(m∠LEF) = 2(3y + 9)

And 2(2y - 9) + 2(3y + 9) = 180

(2y - 9) + (3y + 9) = 90

5y = 90

y = 18  

6 0
3 years ago
Find the solution of the system of equations. 6x -y= 21. -5x + y= -18​
Lapatulllka [165]
First one is -6 and the second one is -3
7 0
2 years ago
Solve for w and y <br><br>w= <br><br>y=​
Contact [7]

Answer:

w=√200 (or 14.14)

y=20

yea pretty simple its just the Pythagorean theorem and the fact that a triangle with equal base angles is isosceles triangle

8 0
1 year ago
Keith applies a brand new fertilizer to his grass
Tema [17]
Makes his grass greener and healthier
3 0
3 years ago
Read 2 more answers
Other questions:
  • What formula can we use to find the circumference of a circle?
    10·2 answers
  • 12 divided by 100 as a mixed number or whole number
    5·1 answer
  • 92.6 % of 103.93 km Give your answer rounded to 2 DP.
    8·1 answer
  • PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!<br><br> What is the value of x?
    12·1 answer
  • How does the slope of a road affect a person`s driving?
    5·1 answer
  • The length of a rectangle is 8 feet more than the width. If the width is increased by 4 feet, and the length is decreased by 5 f
    8·1 answer
  • Which of these logs is the greatest? I need to know how to figure this out for a math test tomorrow. Could someone explain the p
    11·1 answer
  • Express (x + 10)^2 as a trinomial in standard form.
    8·1 answer
  • Given<br>that A -<br>8<br>2.<br>find<br>2<br>4 나​
    9·1 answer
  • Solve system of equations y=3/4x+2 5x+4y=-24
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!