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OverLord2011 [107]
3 years ago
12

What are the solutions for x to the equation (x-3)(x+8)=0

Mathematics
1 answer:
hichkok12 [17]3 years ago
7 0

For this case we have a factored expression, of a second degree equation:

((x-3) (x + 8) = 0

To find the solutions:

  • x-3 = 0

we add 3 to both sides of the equation:

x=3

  • x+8=0

We subtract 8 on both sides of the equation:

x = -8

Thus, the solutions of the equation are:

x_ {1} = 3\\x_ {2} = - 8

Answer:

x_ {1} = 3\\x_ {2} = - 8

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PQR is a right angled triangle calculate the size of angle marked x
romanna [79]

Answer:

\displaystyle x \approx 37.4^\circ

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<u> </u>

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] cosθ = adjacent over hypotenuse<u> </u>

Step-by-step explanation:

<u>Step 1: Define</u>

Angle θ = <em>x</em>

Adjacent Leg = 5.8

Hypotenuse = 7.3

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

  1. Substitute in variables [Cosine]:                                                                    \displaystyle cosx^\circ = \frac{5.8}{7.3}
  2. [Fraction] Divide:                                                                                             \displaystyle cosx^\circ = 0.794521
  3. [Equality Property] Trig inverse:                                                                    \displaystyle x^\circ = cos^{-1}(0.794521)
  4. Evaluate trig inverse:                                                                                      \displaystyle x = 37.39^\circ
  5. Round:                                                                                                             \displaystyle x \approx 37.4^\circ
8 0
2 years ago
Anyone I need help with this problem plss
Nady [450]

Answer:

About 1.23 standard deviation above the mean

Step-by-step explanation:

From what we have here, we need to calculate the difference between the given value and the mean and divide by the standard deviation

That would be through calculating the z score as follows;

z-score = (x - mean)/SD

where x is the given value

z-score = (87-71)/13 = 1.23

Since the score is bigger than the mean, the correct choice here is that the score is about 1.23 standard deviation above the mean

3 0
2 years ago
Dan weighs 205 pounds but is only 5 feet 8 inches tall. Evan is 6 feet tall. How much would you expect Evan to weigh if they hav
Rina8888 [55]

Answer:

Around 217 pounds

Step-by-step explanation:

Let's convert the height into inches.

5 feet 8 = 5\cdot12 + 8 = 60 + 8 = 68

6 feet = 6\cdot12 = 72.

We can set up a proportion

\frac{205}{68} = \frac{x}{72}

We can use the cross products property to find x.

205\cdot72=14760\\\\\\14760\div68\approx217

Hope this helped!

4 0
3 years ago
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45.83333333 as a fraction
hammer [34]

Answer:

275/6

Step-by-step explanation:

3 0
2 years ago
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A line passes through the point (10,-8) and has a slope of -5/2. write an equation in point-slope form for this line.
Nady [450]

Answer:

y= -5/2 + 17

Step-by-step explanation:

y=mx+b

-8=-5/2(10)+b

-8=-25+b

17=b

y = -5/2x + 17

6 0
2 years ago
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