MATHEMATICS MIDDLE SCHOOL

Twice a number is equal to negative four. Which equation could be used to find the number?

Answers

Answer 1
Answer:

2n = - 4

n = - 4 : 2

n = - 2
Answer 2
Answer:

Answer:

2x = -4

Step-by-step explanation:

x is 'a number'

If you wanted to solve your equation:

2x = -4

2x/2 = -4/2 Divide both sides by 2

(To get x alone)

x=-2

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The mass of a textbook is about 1.25 kilograms.About how many pounds is this?

Answers

1.25kg = 2.75577828 pounds

Why cant bicycles stand up by themselves

Answers

Well if they dont have training wheels on the bike it is jot able to stay stabled and balance
they can, its just very difficult to get them to because their tires aren't solid and flat so the bike can tip easily. their centre of gravity also moves easily so it is very difficult to balance them.

hope this helps :)

List the operations in the order you will perform them to simplify 12+(60-2)÷7.

Answers

peranthesis, divide then add
Operations: PEMDAS. Solve the parenthises. then is D, Division.  then A addition

Worth 90 points and a brainliest if you get them all right not lying1) Select all irrational numbers.
√4
√8
√10
√15
√36

2) Select all irrational numbers.
√3/16
√4/16
√9/16
√3/4
√9/4

3) Select "Rational" or "Irrational" to classify each number.

0.25 Rational or Irrational

0.25 Rational or Irrational

0.33 Rational or Irrational

4)Select "Rational" or "Irrational" to classify each number.
23 Rational or Irrational
π Rational or Irrational
√400 Rational or Irrational
√36 /2 Rational or Irrational

5) Select all numbers that are irrational.
π
8√
144−−−√
0.45

Answers

Answer:

See Below

Step-by-step explanation:

1)√8 √10 √15

2)√3/16 √3/4

3)

0.25 R

0.25 R

0.33 R

4)

23 R

pi IR

√400 R

(√36)/2 R if its √(36/2) then IR

5)

pi

√8

Hope this helped!

Answer:

That guy was right now let him have branlyist thing!

Step-by-step explanation:

The sum of two numbers is 38. The greater number is 5 more than twice the lesser number. What is the greater of the two numbers?

Answers

Have the first number be x and the other number be y.

Write the first equation: The sum is 38:

x+y=38

Then the second equation: x is 5 more than than 2y:

x=2y+5

Take the first equation and make it y=38-x

Then substitute it in for the 2nd equation to find x:

x=2(38-x)+5

x=76-2x+5

3x=81

x=27

Then substitute that into the 1st equation to find y:

(27)+y=38

y=11

The first number (x) is greater than the second number (y) because 27 is greater than 11

What is 8/9 in a decimal form

Answers

8/9 in decimal form.

=9 divided by 8 or 9/8

=0.888
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