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3 years ago

(-12+48i)+(15+21i) in simplifying complex numbers

1 answer:

swat323 years ago

5 0

So if the "i" becomes confusing, just think of it as x
so it would become (-12+48x) +(15+21x)
then you would split up the terms by constants and coefficients
-12+15 +48x+21x
3+69x and then you substitute back for i
3+69i

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Solve for b in the literal equation y = 17x + 17b

ankoles [38]

Answer:

b= -x+ y/17

Step-by-step explanation:

1. Subtract 17x from both sides of the equation in order to isolate b on one side.

y -17x= 17b

2. Divide every term by 17 in order to isolate b from any coefficients.

y/17 -17x/17 = 17b/17

3. Simplify

b= -x+y/17

5 0

3 years ago

Jax has 42 baseball cards and 70 football cards that he wants to group into packages each package will have the same number of c

vovangra [49]

Not sure if I am right by what you are asking, but.... 42 and 70 are both able to be divided by 7. 42/7=6 and 70/7=10 . Therefor, each package of baseball cards will have 6 cards in them and there will be 7 packages. On the other hand, there will be 10 football cards in each package and there will be 7 packages as well.
I'm sure this is the correct answer you are looking for. If you need any further help let me know!

7 0

3 years ago

Algebraic expression and identity 1)simplify the following (3a+b)3 +(3a-b)3

mylen [45]

Answer:

$(3a+b)^3+(3a-b)^3=54a^3+18ab^2$

Step-by-step explanation:

Given: $(3a+b)^3+(3a-b)^3$

Formula: $x^3+y^3=(x+y)(x^2-xy+y^2)$

$(x+y)^2=x^2+2xy+y^2$

$(x-y)^2=x^2-2xy+y^2$

$x\rightarrow 3a+b$

$y\rightarrow 3a-b$

$\Rightarrow (3a+b+3a-b)((3a+b)^2-(3a+b)(3a-b)+(3a-b)^2)$

$\Rightarrow (6a)(9a^2+b^2+6ab-9a^2+b^2+9a^2+b^2-6ab)$

$\Rightarrow (6a)(9a^2+3b^2)$

$\Rightarrow 54a^3+18ab^2$

5 0

3 years ago

PLEASE HELPPPPPP ME

seraphim [82]

Answer:

True

Step-by-step explanation:

Do the working for it and youll find the answer

$1 + cosa$

$\pi$

5 0

3 years ago

Need some help with this question!

Veronika [31]

1. solve for x in first to just find nterms of y

x=12-y
sub that for x in other one
first divide that one by 2 to make it easier
2x-y=18
2(12-y)-y=18
24-2y-y=18
24-3y=18
minus 24 both sides
-3y=-6
divide -3
y=2

D is answer

2.
find intersection of x+y=5 and -2x+3y=6
or easiers, just test the intersections
wait, they all intersect in the same place
this is super easy
pick ANY point that is in that reigon and see if it is true

A, if we pick lets say (5,5)
that is false for x+y<5
not A

B
pick (10,0)
false for first one
not B

C
pick (0,0)
true for first
false for 2nd
not C

D. pick (-10,0)
true for first
true for 2nd

answer is D

answer is D for both questions

6 0

3 years ago