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Oliga [24]
3 years ago
13

PLEASE HELP ILL GIVE BRAINLIEST !!! 100 POINTS !! NO FAKE ANSWERS !

Mathematics
2 answers:
Molodets [167]3 years ago
8 0

Answer:

10-5i

Step-by-step explanation:

Conjugate is the change of sign

so I changed the + sign to -

svet-max [94.6K]3 years ago
6 0

Answer:

20.

Given, complex number is 10+5i .

We need to find sum of the given complex number and its conjugate. The conjugate of 10+5i is 10-5i. Therefore, the sum will be 10+5i+10−5i=20.

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Express 4x^2-25 as a product of two binomials.
Andrei [34K]

4x^2-25= (2x)^2-5^2=(2x-5)(2x+5)

Used: a^2-b^2=(a+b)(a-b)

5 0
3 years ago
Read 2 more answers
Parallel lines in space are coplanar.
kakasveta [241]
Coplanar lines are line witch lie on the same lie on the same plane. two parallel lines or two intersecting lines always lie in a plane. Thus, two line are coplanar, if and only if they are either parallel or intersecting. lines in three dimensional space are coplanar, only if they are not skewed lines.
3 0
3 years ago
Simplify the expression.<br> 3^-9 * 3^6 * 3^6<br><br> 3^3<br> 9^3<br> 27^3<br> 3^-324
kow [346]
3^3. if you're simplifying then you keep the base the smae but add the exponents since you are "multiplying" the bases

7 0
3 years ago
A number is equal to twice a smaller number plus 3. Yhe same number is equal to twice the sum of smaller number and 1. How many
allsm [11]

Answer:

There is no solution to the problem

Step-by-step explanation:

In order to find the solutions to the problem you can write the situation in an algebraic form.

You have that a number is equal to twice a smaller number plus 3. This can be written as follow:

x=2y+3      (1)

where x is the number and y is the smaller number

Furthermore, the same number x is equal to twice the sum of the smaller number and 1, which can be written as follow:

x=2(y+1)     (2)

To find the solution you equal the equation (1) with (2), and you solve for y:

2y+3=2y+1

3=1

You obtain an inconsistency, hence, the situation of the problem does not have solution

5 0
3 years ago
Solve this inequality.<br>7x + 2 &gt; 30<br>A.x 224<br>B.x &gt; 196<br>C.x 4<br>D.x &gt; 3​
Oliga [24]

Answer:

x > 4

Step-by-step explanation:

7x + 2 > 30

Subtract 2 from each side

7x + 2-2 > 30-2

7x > 28

Divide each side by 7

7x/7 > 28/7

x > 4

6 0
3 years ago
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