3 years ago

What is the value of b if (3 + i) and (3 - i) are complex roots of 2x² + bx + 20 = 0?

Mathematics

1 answer:

Bogdan [553]3 years ago

3 0

A is the answer Bc I did this before and my teacher said I did an excellent job!

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What is the midpoint of (8,10) and (-8,8)

nasty-shy [4]

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Answer:

(0, 9)

Step-by-step explanation:

The midpoint coordinates are the averages of the end point coordinates.

M = (A +B)/2

M = ((8, 10) +(-8, 8))/2 = (8 -8, 10+8)/2 = (0, 18)/2

M = (0, 9)

The midpoint is (0, 9).

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3 years ago

What is the product of 41 and 8.4 x 10^4 expressed in scientific notation?

LenaWriter [7]

Answer:

3.44 x 10^6

Step-by-step explanation:

41 x 8.4 = 344.4

344.4 x 10^4 = 3.44 x 10^4+2

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3 years ago

What is the sum of (4x2 – 10x + 3) and (-6x2 + 10x + 12)

kykrilka [37]

Answer:

-2x² + 15

Step-by-step explanation:

Step 1: Add like terms

4x² - 6x² = -2x²

-10x + 10x = 0

3 + 12 = 15

Step 2: Rewrite

-2x² + 15

6 0

3 years ago

Problem 2. 1/8×5/6, And answer in simplest form

Ostrovityanka [42]

The simplest form is 5/48

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3 years ago

A mix of factoring by grouping. Factor the exressions. 17ax+17a-x-1 Please explain/show steps on how to do this!

mario62 [17]

Answer:

$(x+1)(17a-1)$

Step-by-step explanation:

We are given that

$17ax+17a-x-1$

We have to factorize the given expression.

Pair up the terms

$(17ax+17a)+(-x-1)$

Now, taking common factor

$17a(x+1)-1(x+1)$

Taking common (x+1)

$(x+1)(17a-1)$

Now, we get

$(x+1)(17a-1)$

This is required factors of given expression.

4 0

3 years ago