MATHEMATICS HIGH SCHOOL

What is the value of (–7 + 3i) – (2 – 6i)?–9 + 9i
–9 – 3i
–5 – 3i
–5 + 9i

(-7 + 3i) - (2 - 6i) = -7 + 3i - 2 + 6i = (-7 + (-2)) + (3i + 6i) = -9 + 9i

This is how I worked it out^ Was I correct?

Answers

Answer 1
Answer: -9+9i is in fact correct so A is right
:)
Answer 2
Answer: The answer is correct. If you have a graphing calculator, there is an "i" button, so the calculator does all your work for you and is a good way to check your answers.

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What is 1.45 percent of 17,370.98

Answers

'of' can be translated to as multiply

1.45 percent means 1.45/100 or 0.0145

so just multiply 0.0145 by 17,370.98 and get 251.879
well i believe its 251.87961

A recent survey of 8,000 high school students found that the mean price of a prom dress was $195.00 with a standard deviation of $12.00. Alyssa thinks that her school is more fashion conscious and spent more than $195.00. She collected data from 20 people in her high school and found that the average price spent on a prom dress was $208.00. Which of the following is the correct z-statistic for this situation?

Answers

The z-statistic can be calculated as the difference in the population mean and sample mean divided by the standard error. The standard error can be calculated as the standard deviation divided by square root of sample size. The standard error: SE = 12/ sqrt(20) = 2.68 The z-statistic: (195 -208) 2.68 = -4.86

Answer:

4.84

Step-by-step explanation:

got it right on edge2020

PLEASE ANSWER THESE :Use a calculator to find the cube root of -250 correct to 2 decimal places.

Answers

Truncated to 2 places . . . -6.29 Rounded to 2 places . . . -6.30
-6.29960524... I'm assuming you can round.

Jacob has a piece of toast that has butter on one side, and he dropped it twice. Both times it landed with the butter side up. If he drops it two more times, what is the probability that it will have landed butter side up a total of three times? one over four one over two one over three two over three

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Answers

X=16 put 5 in the place of Y Then solve for X
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What value of x will make 2x-6=3x+1-x-7 true?

Answers

2x-6=3x=3x+1-x-7
2x-6=(3-1)x+7
2x-6=2x+8
2x-6-2x+6=2x-2x+8+6
0=0+14
No Solution
Hi there

2x - 6 = 3x + 1 - x - 7
First we need to combine like terms
2x - 6 = (3x - x) + (1 - 7)
2x - 6 = 2x - 6
2x - 2x = -6 + 6
0 = 0
Answer : All real numbers are solutions.

If you have any further questions please let me know :)
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