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DerKrebs [107]
3 years ago
13

Solve for x and y (x+yi) + ( 4+9i) = 9-4i

Mathematics
1 answer:
tino4ka555 [31]3 years ago
6 0
B is the answer to this question...
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What are the solutions to the following system of equations? y = x2 + 3x − 7 3x − y = −2 (2 points) (3, 11) and (−3, −7) (11, 3)
Minchanka [31]
ANSWER

(3, 11) and (−3, −7)


EXPLANATION

The given system of equations are:


y =  {x}^{2}  + 3x - 7

and

3x - y =  - 2

or

y = 3x  + 2


We equate the two equations to obtain,



{x}^{2}  + 3x - 7 = 3x + 2

We rewrite in standard quadratic form to obtain,

{x}^{2}  + 3x  - 3x - 7 - 2 = 0


This simplifies to

{x}^{2}- 9= 0


We solve for x to obtain,


{x}^{2}  = 9

x =  \pm \sqrt{9}

x =  \pm 3

x = 3 \: or \: x =  - 3

When
x = 3

y = 3(3) + 2 = 11

When x=-3,

y = 3(  - 3) + 2 =  - 7


Therefore the solution for the system is (3, 11) and (−3, −7).
7 0
3 years ago
Read 2 more answers
-5n +8=-7 two step equations - intergers
vaieri [72.5K]
-5n + 8 = -7
-5n + 8 - 8 = -7 -8
-5n = -15
-5n/-5 = -15/-5
n = 3
5 0
3 years ago
What is 23d=109<br> pls answer
grandymaker [24]

Answer:

what kinda... what do they give yall these days but anyways,

Step-by-step explanation:

Divide each term by

23 and simplify.

Exact Form:

d=109/23

Decimal Form:

d=4.73913043

um…

Mixed Number Form:

d=4 17/23

5 0
3 years ago
A number x divided by 3 is at most 5 An inequality that represents this word sentence is
svet-max [94.6K]

Answer:

x/3 ≥ 5

Step-by-step explanation:

4 0
3 years ago
Solve y=3bx-7x for x
irina [24]
Y = 3bx - 7x
y = x(3b - 7)

Divide each side by 3b - 7 (assume that it is not zero).
\frac{y}{3b-7} =x

Answer:
x= \frac{y}{3b-7}
6 0
3 years ago
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