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3 years ago

Let A={15,25,35,45,55,65} and B= {25,45,65} what is A n B?

Mathematics

1 answer:

ss7ja [257]3 years ago

6 0

Answer:

[25, 45,65]

Step-by-step explanation:

These are the common terms in A as well as B

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What are the solutions of x^2 - 2x + 10 = 0?

dybincka [34]

Answer:

C. x = 1 + 3i or x = 1 - 3i

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Standard Form: ax² + bx + c = 0
Quadratic Formula: $x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$

Algebra II

Imaginary Roots: √-1 = i

Step-by-step explanation:

Step 1: Define

x² - 2x + 10 = 0

Step 2: Identify Variables

a = 1

b = -2

c = 10

Step 3: Find roots

Substitute [Quad Formula]: $x=\frac{2\pm\sqrt{(-2)^2-4(1)(10)} }{2(1)}$
Exponents: $x=\frac{2\pm\sqrt{4-4(1)(10)} }{2(1)}$
Multiply: $x=\frac{2\pm\sqrt{4-40} }{2}$
Subtract: $x=\frac{2\pm\sqrt{-36} }{2}$
Factor: $x=\frac{2\pm\sqrt{-1} \sqrt{36} }{2}$
Simplify: $x=\frac{2\pm6i }{2}$
Factor: $x=\frac{2(1\pm3i) }{2}$
Divide: $x=1\pm3i$

5 0

3 years ago

What is the brxt numver

lyudmila [28]

1st box is 28, 2nd box is 42!! If you need an explanation you can message me:-)

7 0

4 years ago

Brandon buys a radio for $48.17 in a state where the sales tax is 7%. How much does he pay in taxes? If necessary, round to the

shusha [124]

Answer:

49.0809

Step-by-step explanation:

Round it up to 49.10

8 0

3 years ago

What is the slope of (2,22) -(4,32) a.5 b.10 c.2 d.1

zhenek [66]

Use the formula for the slope of a line by substituting the given coordinates:
$\frac{ y_{2}-y_{1}}{ x_{2} - x_{1} }$
So for the coordinates (2,22) and (-4,-32)
So (-32-22)/(-4-2)= -54/-6= 9 is the slope of the line

6 0

3 years ago

A livestock pen is built in the shape of a rectangle that is four times as long as is wide. The total perimeter is 60 ft. Write

bonufazy [111]

Answer:

Perimeter = 60ft = 2(4x + x)

breadth = 6ft

length = 24ft

Step-by-step explanation:

Perimeter = 2 (L + B)

L =length

B = Breadth

x= breadth

4x = length

Perimeter = 60ft = 2(4x + x)

Dividing both sides by 2 :

30ft= 4x + x

30ft = 5x

divide both sides by 5

6ft= x

breadth = 6ft

length = 4x= 4 x 6 = 24ft

3 0

3 years ago