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Sati [7]
3 years ago
12

(5+5i)(5-5i)=what????

Mathematics
2 answers:
Dafna1 [17]3 years ago
6 0
Looks like distributive property 5 times 5 is 25, 5 times a -5i is -25i , 5i times 5 is positive 25i , 5i times 5i gives you ,  25 i squared , so now you combine like terms , you have 25 -25i + 25i - 25i squared , cross out -25i and the positive 25i anf your left with 25-25 squared . 
Irina18 [472]3 years ago
3 0
(First,Outer,Inner,Last)
25-25i+25i-25
0
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To be honest this is a dud question just answer for points and if multiple people answer I will give one of them brainliest.
MArishka [77]

Answer:

If you live to be 70, you will have spent 10 years of your life on Monday.

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3 years ago
A taxi charges $7.75 plus $0.56 per mile.
stich3 [128]
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5 0
3 years ago
What are the missing angles
stepan [7]

Missing sides or angles??

If it's missing sides... Then using sine rule

A/ sin A = B/ sin B

Let sin A =30° and A=8

Let sin B=60° and B =?

Hence 8/sin 30°=B/sin 60°

Multiplying 8 x sin 60 =B sin 60

6.928 = 0. 5B

Dividing both sides by 0.5

Hence B= 13.856

doing same for side c

Let sin A =30° and A =8

Let sin c =90° and C =?

Hence 8/sin30° = C/sin 90

Sin 90° x8 =. 0.5c

Sin 90=1

1x8 =0.5c

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7 0
3 years ago
A random sample of 500 army recruits has a mean height of 68 inches with a standard deviation of 2.5 inches. If a 95% confidence
GaryK [48]

Answer:

0.22

Step-by-step explanation:

Sample given is 500, so use z-score for the critical value

Given 95% confidence interval;

∝=100-95 =5% =0.05

∝/2 = 0.05/2 =0.025 ----because you are interested with one tail area

1-0.025= 0.975 -----area to the left

proceed to z-table to read 0.975 = 1.96 as the critical value

standard deviation from the question is 2.5 but because this is a sample then;

standard error for the mean is= standard deviation/√sample= 2.5/√500

=0.1118

Margin of error=1.96*0.1118 =0.2191

3 0
3 years ago
.....................​
Olenka [21]

Answer:

Hope that helps

Step-by-step explanation:

x ≤ −18 (C)

6 0
3 years ago
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