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Mariulka [41]
3 years ago
15

Distribute the expression. 6(3r2 – 4r + 7)

Mathematics
1 answer:
MArishka [77]3 years ago
7 0

Answer:

18r^2 - 24r + 42

you put ^ when you have a exponent

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Match the vocabulary word to its correct definition.
Trava [24]

Answer:

1. Complex number.

2. Imaginary part of a complex number.

3. Real part of a complex number.

4. i

5. Multiplicative inverse.

6. Imaginary number.

7. Complex conjugate.

Step-by-step explanation:

1. <u><em>Complex number:</em></u> is the sum of a real number and an imaginary number: a + bi, where a is a real number and b is the imaginary part.

2. <u><em>Imaginary part of a complex number</em></u>: the part of a complex that is multiplied by i; so, the imaginary part of the complex number a + bi is b; the imaginary part of a complex number is a real number.

3. <em><u>Real part of a complex number</u></em>: the part of a complex that is not multiplied by i. So, the real part of the complex number a + bi is a; the real part of a complex number is a real number.

4. <u><em>i:</em></u> a number defined with the property that 12 = -1.

5. <em><u>Multiplicative inverse</u></em>: the inverse of a complex number a + bi is a complex number c + di such that the product of these two numbers equals 1.

6. <em><u>Imaginary number</u></em>: any nonzero multiple of i; this is the same as the square root of any negative real number.

7. <em><u>Complex conjugate</u></em>: the conjugate of a complex number has the opposite imaginary part. So, the conjugate of a + bi is a - bi. Likewise, the conjugate of a - bi is a + bi. So, complex conjugates always occur in pairs.

4 0
4 years ago
Which decimal is equivalent to 8 9/12 ? A. 8.12 B. 8.75 C. 8.34 D. 8.9
Dmitriy789 [7]
I think that the answer is D
4 0
3 years ago
Juan is on his school's archery team. In a match, he gets 12 arrows to shoot at a target. He gets 8 points if the arrow hits the
ElenaW [278]
B is the answer
Hope that helps
7 0
3 years ago
Which of the following is the missing justification?
Montano1993 [528]

Answer:

B and C

2. B Multiplication property of equality

3. C Distributive Property

Step-by-step explanation:

1. Given

\dfrac{1}{5}\cdot x+6=5

2. Multiply this equation by 5:

\left(\dfrac{1}{5}\cdot x+6\right)\cdot 5=5\cdot 5

Multiplication property of equality

3. Use distributive property of equality:

\dfrac{1}{5}\cdot x\cdot 5+6\cdot 5=25\\ \\x+30=25

4. Subtract 30:

x+30-30=25-30\\ \\x=-5

Subtraction property of equality.

7 0
3 years ago
Read 2 more answers
Blue jeans, Inc. sells jeans that cost $15.99 for a selling price of $42.95. What is the percent of markup based on cost? (Round
trasher [3.6K]
%change=100*(final-initial)/initial

%change=100(42.95-15.99)/15.99=168.61%  (to nearest hundredth of a percent)
8 0
4 years ago
Read 2 more answers
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