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nataly862011 [7]
3 years ago
6

SImplify to standard form (a+bi) (12-9i)²

Mathematics
1 answer:
olga2289 [7]3 years ago
5 0

Answer:

Hello,

Step-by-step explanation:

<u />

<u>Formula used (a+b)^2=a²+2ab+b²</u>

(12-9i)^2=3^2*(4-3i)^2\\\\=9*(16-9-24i)\\\\=9*(7-24i)\\\\=63-216i\\

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Tony and Manuel were trimming the branches of a tree. Tony was using an 18 ft ladder and Manuel was using a 24 ft ladder. Both l
REY [17]

Answer:

9.33 feet = 111.96 inches

Step-by-step explanation:

If we have similar triangles, the rate between matching sides is the same.

So the length of the smaller ladder (18 ft) over the length of the taller ladder (24 ft) is equal to the distance from the bottom of the smaller ladder to the tree (7 ft) over the distance from the bottom of the taller ladder to the tree (x ft):

18 / 7 = 24 / x

x = 7 * 24 / 18

x = 9.33 feet

To find this measure in inches, we just need to multiply by 12:

x = 9.33 * 12 =  111.96 inches

3 0
4 years ago
What function is shown in the graph above?
Verizon [17]

By definition of <em>linear</em> functions and the comparison with the attached figure, the function that represents the graph is y = (7/15) · x + 4, - 6 ≤ x ≤ 9.

<h3>What kind of function represents the graph?</h3>

Graphically speaking, <em>linear</em> functions represent lines and we see that the line seen in the figure presents two bounds, the points (- 6, 0) and (9, 7). <em>Linear</em> functions are characterized by slope and intercept:

y = m · x + b     (1)

Slope

m = (7 - 0)/[9 - (- 6)]

m = 7/15

Intercept

b = 4

By definition of <em>linear</em> functions and the comparison with the attached figure, the function that represents the graph is y = (7/15) · x + 4, - 6 ≤ x ≤ 9.

To learn more on linear functions: brainly.com/question/14695009

#SPJ1

8 0
2 years ago
Please help! And if u do label the answers so Ik which is which if u answer n say idk I’ll report u
Dmitry_Shevchenko [17]

Answer:

5. y-intercept is 8

6. slope is -1/2

7. y=-1/2x+8

7 0
3 years ago
How to simplify the expression (3t) to the fourth power
Nadya [2.5K]

Answer:

81t^4

Step-by-step explanation:

We can write this expression as

(3t)^4

Next, we can distribute the power to each piece inside as there is only one term.

(3^4)(t^4)\\\\81t^4

4 0
4 years ago
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Vikentia [17]
It is 7 radical 3 on the top and radical 3 on the bottom.
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3 years ago
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