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scoundrel [369]
2 years ago
12

What is happening at this step in the equation solving process for 3x+7=5x 7=2x

Mathematics
2 answers:
NeX [460]2 years ago
8 0
3x+7=5x
-3x -3x
7=2x
(Divide both sides by 2)
x=3.5
Leya [2.2K]2 years ago
3 0
Your subtracting 3x from 5x: 5x-3x
This is so you only have a variable on one side
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Translate to an inequality. "A number m is at most 2"
Leni [432]

Answer:

m \leq 2

Step-by-step explanation:

"at most" can translate to "less than or equal to," meaning m is less than or equal to 2.

8 0
3 years ago
The perimeter of a triangle is 27 centimeters. Two sides of the triangle are 7 centimeters and 13 centimeters. Find the length o
Studentka2010 [4]
I believe it’s the answer is 2.6
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2 years ago
The probability distribution for the random variable x follows. x f(x) 20 0.20 25 0.15 30 0.30 35 0.35 (a) Is this probability d
Damm [24]

Answer:

(a) The probability distribution is valid.

(b) The probability that x = 30 is 0.30.

Step-by-step explanation:

The probability distribution of the random variable <em>X</em> is:

<em>    x</em>:  20   |  25  |  30   |   35

f (<em>x</em>): 0.20 | 0.15 | 0.30 | 0.35

(a)

The properties of a probability distribution are:

  1. 0 ≤ P (X) ≤ 1
  2. ∑ P (X) = 1

All the probability value are more than 0 and less than 1.

Compute the sum of all the probabilities as follows:

\sum P(X)=0.20+0.15+0.30+0.35=1

The sum of all probabilities is 1.

Thus, the probability distribution is valid.

(b)

Consider the probability distribution table.

The probability of <em>X</em> = 30 is,

P (X = 30) = 0.30.

Thus, the probability that x = 30 is 0.30.

6 0
3 years ago
Please help me I need the answer in thanks (48 points)
vodomira [7]

Answer:

d is 6

b is 7

c is 4

e is 5

a is 1

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Find the value of x.round to the nearest tenth
Nata [24]

Answer:

\displaystyle x \approx 8.2

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Trigonometry</u>

[Right Triangles Only] SOHCAHTOA

[Right Triangles Only] sinθ = opposite over hypotenuse

Step-by-step explanation:

<u>Step 1: Identify Variables</u>

Angle θ = 23°

Opposite Leg = <em>x</em>

Hypotenuse = 21

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Substitute in variables [sine]:                                                                         \displaystyle sin(23^\circ) = \frac{x}{21}
  2. [Multiplication Property of Equality] Isolate <em>x</em>:                                              \displaystyle 21sin(23^\circ) = x
  3. Rewrite:                                                                                                           \displaystyle x = 21sin(23^\circ)
  4. Evaluate:                                                                                                         \displaystyle x = 8.20535
  5. Round:                                                                                                             \displaystyle x \approx 8.2
7 0
2 years ago
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