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IceJOKER [234]
3 years ago
12

Write (9−4i)2(9−4i) 2 in simplest a+bia+bi form.

Mathematics
1 answer:
Ksivusya [100]3 years ago
5 0

Step-by-step explanation:

(9−4i)2(9-4i)2

Rewrite (9−4i)2(9-4i)2 as (9−4i)(9−4i)(9-4i)(9-4i).

(9−4i)(9−4i)(9-4i)(9-4i)

Expand (9−4i)(9−4i)(9-4i)(9-4i) using the FOIL Method.

Tap for more steps...

9⋅9+9(−4i)−4i⋅9−4i(−4i)9⋅9+9(-4i)-4i⋅9-4i(-4i)

Simplify and combine like terms.

Tap for fewer steps...

Simplify each term.

Tap for more steps...

81−36i−36i−1681-36i-36i-16

Subtract 1616 from 8181.

65−36i−36i65-36i-36i

Subtract 36i36i from −36i-36i.

65−72i

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Mindy buys 12 cupcakes. Nine of the cupcakes have chocolate frosting. What fraction of the cupcakes have vanilla frosting?
Mrac [35]

1 fourth which as a fraction would look like:

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8 0
3 years ago
Do the two tables show the same proportional relationship between x and u? Explain how you know.
Murrr4er [49]

Answer:

y = 2.25x

Step-By-Step Explanation:

If I divide y by x, in any of the tables, it is always 2.25.

y ÷ x = 2.25

Then, I can multiply x on both sides to make the equation showing the proportional relationship.

y ÷ x × x = 2.25 × x

y = 2.25x

<em><u>If this helped, please consider picking this answer as the Brainliest Answer. Thank you!</u></em>

3 0
3 years ago
Which would be the best trend line for the given data set?
KengaRu [80]

y=-2/3x+5

Step-by-step explanation:

From the scattered plot, it is evident that the line of best fit will have a negative slope from the way the plots are aligned.

Selecting the line of best fit that will cut the y axis at +5, the points can be estimated as;

(5,1.5) and (3.5,2.5)

The slope can be found as;

m=Δy/Δx

m=2.5-1.5/3.5-5 =1.0/ -1.5 = -0.67

Finding the equation as;

m=Δy/Δx

-0.66 = y-2.5/x-3.5

-0.66(x-3.5) = y-2.5

-0.66x+2.3=y-2.5

-0.66x+2.3+2.5=y

-0.66x+4.7=y

⇒⇒  y= -0.66 x + 4.7

⇒⇒y= -2/3 x + 5

Learn More

Linear equations:brainly.com/question/8738418

Keywords: best trend line, data set

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5 0
3 years ago
2y + 2x + 3y + 4z + 5x​
IRISSAK [1]
5y+7x+4z this is the simplified answer .
6 0
3 years ago
Please help me! this question is worth 30 points!
iren [92.7K]

Answer:

1/k^4

Step-by-step explanation:

7 0
3 years ago
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