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Roman55 [17]
3 years ago
7

Simplify the given expression below:

Mathematics
2 answers:
Zina [86]3 years ago
4 0
The answer will be C. OR 3. 11−<span>13<span>i</span></span>
WINSTONCH [101]3 years ago
4 0

Answer:

The correct option is 3.

Step-by-step explanation:

The given expression is

(7-3i)\cdot(2-i)

We need to find the simplified form of given expression.

Using distributive property, the given expression can be written as

7\cdot(2-i)-3i\cdot(2-i)

7(2)+7(-i)-3i(2)-3i(-i)

On further simplification we get

14-7i-6i+3i^2

14-13i+3(-1)               [\because i^2=-1]

14-13i-3

On combining like terms we get

(14-3)-13i

11-13i

The simplified form of given expression is 11-13i. Therefore the correct option is 3.

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Give the domain and range of each relationship. Determine whether or not each relationship is a function.
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Answer:

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Step-by-step explanation:

6 0
3 years ago
Find the value of the expression |2x−8| where x=−2.5; 0; 4; 5; 9.5.
Lelu [443]

The absolute value |x| returns the "positive version" of a number. In other words, if x is already positive, then |x|=x. Otherwise, if x is negative, then the absolute value changes its sign, so that it returns positive: |x|=-x.

So, in this case, we have to plug the required values for x in the expression 2x-8. Then, if the result is positive we're ok, otherwise we discard the negative sign.

We have:

x=-2.5 \implies |2x-8| = |-5-8|=|-13|=13

x=0 \implies |2x-8| = |0-8|=|-8|=8

x=4 \implies |2x-8| = |8-8|=|0|=0

x=5 \implies |2x-8| = |10-8|=|2|=2

x=9.5 \implies |2x-8| = |19-8|=|11|=11

5 0
2 years ago
Susie scored 85, 84,and 78 on three of the four math tests. if her average score for the four tests was 86. what was her score o
nata0808 [166]
(85 + 84 + 78 + x) / 4 = 86
(247 + x) / 4 = 86
247 + x = 86 * 4
247 + x = 344
x = 344 - 247
x = 97 <=== her score was 97
7 0
3 years ago
Read 2 more answers
Help me find x on either one of these problems please!
mash [69]
In the problem with the white circle, x=100, in the problem with the blue circle, x might equal 165, but I'm not entirely certain.  But I am certain about the first one.
3 0
3 years ago
1(3√2)2=2n what is n? this might be hard to do but I need help asap!! ty
Vladimir [108]

Answer:

n=3\sqrt{2}

Step-by-step explanation:

2n=1\times \left(3\sqrt{2}\right)\times \:2

2n=2 \times 3\sqrt{2}

2n=6\sqrt{2}

\frac{2n}{2}=\frac{6\sqrt{2}}{2}

n=3\sqrt{2}

4 0
3 years ago
Read 2 more answers
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