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sergij07 [2.7K]
3 years ago
7

Simplify: (x+3)(x-3)-(1-9)

Mathematics
2 answers:
Fiesta28 [93]3 years ago
8 0

Answer:

x^2-1

Step-by-step explanation:

xxMikexx [17]3 years ago
3 0

Answer:

67

Step-by-step explanation:

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Three multiplied by the sum of 4 and a number is the same as 12 more than the number. Find the number.
Bess [88]

Answer:

3(4+n) = 12+n is an equation that could be used.

12n = 12+n

11n = 12

n= 1+1/11

Step-by-step explanation:

7 0
2 years ago
3x<img src="https://tex.z-dn.net/?f=3x%5E%7B2%7D%20%2B8x-10" id="TexFormula1" title="3x^{2} +8x-10" alt="3x^{2} +8x-10" align="a
Licemer1 [7]

The solution to the quadratic equation 3x² + 8x - 10 by using the quadratic formula is x = 0.927 or -3.594

<h3>Solving quadratic equations.</h3>

Quadratic equations are algebraic expressions that are represented in the power of the second degree. They usually take the form ax² + bx + c

From the given information, we are to solve the quadratic equation:

  • 3x² + 8x - 10

Using the quadratic formula:

\mathbf{=\dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}}

where:

  • a = 3
  • b = + 8
  • c = - 10

\mathbf{= \dfrac{-(8)) \pm \sqrt{(8)^2 - 4(3 \times (-10))}}{2(3)}}

\mathbf{= \dfrac{-(8)) \pm \sqrt{64 -4 (-30)}}{6}}

\mathbf{= \dfrac{-(8)) \pm \sqrt{64+120}}{6}}

x = 0.927 or -3.594

Learn more about solving quadratic equations here:

brainly.com/question/8649555

#SPJ1

3 0
2 years ago
Which of the following is a perfect cube? 4 8 9 12
vichka [17]
<span>Out of those, 8 is the one that is a perfect cube. </span>
4 0
3 years ago
Read 2 more answers
The diameter of a cylindrical construction pipe is 4 ft. If the pipe is 20 ft long, what is its volume?
hram777 [196]
Works if u used 3.14 as pi
V=251.2
6 0
3 years ago
In the figure shown, line AB is parallel to line CD.
EastWind [94]

Answer:

x = 50

Step-by-step explanation:

the angle next to x is 65 so the angle on the oposite side will also be 65.

a straight line = 180

so 180 - 65 -65 = 50

x = 50

3 0
3 years ago
Read 2 more answers
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