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
faltersainse [42]
2 years ago
5

PLS HELP IM FAILING MATH!

Mathematics
1 answer:
oksano4ka [1.4K]2 years ago
7 0

Answer:

1. Never true

2. Never true

3. Bad question!  Typo? (see discussion below)

4. Always true

5. Always false

Step-by-step explanation:

1. x - 13 = x + 1.  Subtract  x  from both sides of the equation, and you get -13 = 1.  False!  (Never true!)

2.  x + 1/2 = x - 1/2.  Subtract x from both sides:  1/2 = - 1/2.  False! (Never true!)

3. This one's weird, with two equal signs.  That's not unusual; multiple equal signs are often used when a chain of equalities is being displayed.  For instance, you can write  (3)(2x + 5) = (3)(2x) + (3)(5) = 6x + 15.  That's an example of the Distributive Property--the 3 is multiplied by both of the terms inside parentheses (shown after the first equal sign), then actually doing those multiplications produces the expression after the second equal sign.

OK!  This question says 2(x + 3) = 5x = 6 - 3x.  Take it in two parts.

a. 2(x + 3) = 5x   Distribute the 2.

2x + 6 = 5x   Now subtract 2x from both sides.

6 = 3x   Divide both sides by 3.

2 = x  So that first part is true only when x = 2.  Gaa!  That's not one of your answer choices.  Now, check out the second part

b.  5x = 6 - 3x  Add 3x to both sides.

8x = 6   Divide by 8

x = 6/8 = 3/4

It doesn't help to use the first and <u>third</u> expressions, either.

2(x + 3) = 6 - 3x   Distribute the 2

2x + 6 = 6 - 3x  Add 3x.

5x + 6 = 6   Subtract 6.

5x = 0   Divide by 5

x = 0

None of these is always false.  None of these is always true.

4.  x - 3 = 2x - 3 - x   Simplify the right side by combining the x terms.

x - 3 = x - 3  Aha!  Same expression on both sides!  Always true

5.  3(x - 5) = 2(x - 5) + x  Distribute the 3. Distribute the 2.

3x - 15 = 2x - 10 + x  Combine the x terms on the right.

3x - 15 = 3x - 10  Subtract 3x

-15 = -10  (Always false!)

You might be interested in
Enter the correct value so that each expression is a perfect square trinomial
myrzilka [38]

Answer:

Step-by-step explanation:

1). x² - 10x + a²

  By using the formula of (a - b)² = a² - 2ab + b²

  x² - 2(5)x + a²

  Therefore, for a perfect square of the expression a should be equal to 5.

  Therefore, (x² - 10x + 25) will be the answer.

2). x² + 2ax + 36

  = x² + 2(a)x + 6²

  For a perfect square of the given expression value of a should be 6.

   x² + 2(a)x + 6² = x² + 2(6)x + 6²

                           = (x + 6)²

  Therefore, x² + 12x + 36 will be the answer.

3). x^{2}+\frac{1}{2}x+a^2

    x^{2}+2(\frac{1}{4})x+a^2

   To make this expression a perfect square,

   a² = (\frac{1}{4})^2

   x^{2}+2(\frac{1}{4})x+(\frac{1}{4})^2 = (x+\frac{1}{4})^2

  Therefore, the missing number will be \frac{1}{16}.

5 0
3 years ago
6.200,6.532,6.6,6.4
Anton [14]

From lea st to greatest it would be 6.200, 6.4, 6.532, and 6.6

5 0
3 years ago
Read 2 more answers
Need help don't really get the question
marishachu [46]

Answer:

There are 24 squares

Step-by-step explanation:

By taking the small triangles and connecting them to make squares and adding those to the number of squares already there there are 24 squares in total.

8 0
3 years ago
Answer all three please​
sweet-ann [11.9K]

6. Answer:

72.84

Step-by-step explanation:

To find the perimeter of the rectangle, just add the sides together except the one connected to the semicircle

12 + 15 + 15 = 42

The diameter of the semi circle is 12

πr + d = 6 * π + 12 ≈ 30.84

Add them together

42 + 30.85 = 72.84

7. Answer:

78.54

(78.5)

Step-by-step explanation:

The shape is a circle

Radius is 5

Diameter is 10  (diameter is always double of the radius)

π * r^2 = π * 25 cm^2 = 78.54 cm^2

8. Answer:

50.27

Step-by-step explanation:

The shape is a circle

Radius is 4

Diameter is 8  (diameter is always double of the radius)

π * r^2 = π * 16 ft^2 = 50.27 ft^2

(16 = 8 * 2)

7 0
3 years ago
How would you write the function shown in the function machine in function notation
kow [346]
Wow. this is too difficult for me
7 0
3 years ago
Other questions:
  • Heeeeeelllpppppp please
    15·1 answer
  • Round 46.231 to the nearest tenth
    11·2 answers
  • If z =<img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B2%7D%20%20" id="TexFormula1" title=" \sqrt{2} " alt=" \sqrt{2} " align="a
    11·1 answer
  • Ms.Anlonzo orderd 4,000 markers for her store.Only 1 tenth of them arrived.How many markers did she receive?
    10·1 answer
  • -4(5c+7)-3c+13 simplify, pls include step-by-step thank you &lt;3
    13·2 answers
  • Martinez Company’s relevant range of production is 7,500 units to 12,500 units. When it produces and sells 10,000 units, its ave
    11·1 answer
  • Please help me with this right away. Please show the work
    14·1 answer
  • How do you find the x
    6·1 answer
  • Rewrite y + 3 = 0 using function notation.
    8·2 answers
  • Solve the equation by clearing the decimals: 0.8x -0.3 = 0.7x + 0.2
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!