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3 years ago

1. (3-7i) and (0+2i)

Mathematics

2 answers:

Nastasia [14]3 years ago

6 0

Answer:

3=9i

Step-by-step explanation:

1. (3-7i) and (0+2i)

we will take the parenthesis out it will be

3-7i=0+2i

we will move 7i and 2i together and the same for others

so it will be

3-0=2i+7i

to simplify

it will be

i=3

Gennadij [26K]3 years ago

5 0

hahahah hfguiyfewkuygf 30 points i wnt it not 5

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Mice21 [21]

Answer:

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Step-by-step explanation:

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3 years ago

The product of 12 and k is 84.<br><br> Solve for k.

Mrac [35]

Answer:

The product of 12 and k is 84

According to the given problem, the equation is

$\boxed{12k = 84} \\ k = \frac{84}{12} \\ \boxed{k = 7}$

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2 years ago

A 90 percent confidence interval for the slope of a regression line is determined to be (-0.181, 1.529). Which of the following

GenaCL600 [577]

Answer: a. The correlation coefficient of the data is positive.

Step-by-step explanation:

Estimated slope of sample regression line = $\dfrac{Upper \ limit + lower\ limit}{2}$

Here , confidence interval : (-0.181, 1.529)

Estimated slope of sample regression line = $\dfrac{-0.181+1.529}{2}$

$=\dfrac{1.348}{2}\\\\=0.674\ \ \ \ [\text{ positive}]$

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But, d. and e. are wrong(0.674 ≠ 0 or 1.348).

We cannot check residuals or its sum from confidence interval of slope of a regression line, so b is wrong.

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3 years ago

The length of a rectangle is eight more than twice its width. The perimeter is 96 feet. Find the dimensions of the rectangle

blagie [28]

Step-by-step explanation:

Length = L

Width = W

L=8 more than 2W

L = 8 * 2W

L = 16W

Perimeter = 96

perimeter is the lengths of all sides added together

2L + 2W = 96

we have

L = 16W

2L + 2W = 96

let's do substitution

put what L = into 2L + 2W = 96

2(16W) + 2W = 96

can you rearrange that to get w

put answer in comment

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2 years ago

Jake earned 30 points out of a total of 43 on his most recent math test. on his social studies test, jake scored 85 out of a pos

djverab [1.8K]

Answer: See explanation

Step-by-step explanation:

Your question isn't really clear but let me help.

For Maths test,

Point earned = 30

Total point = 43

Percentage = 30/43 × 100 = 69.77%

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Point earned = 85.

Total point = 124

Percentage = 85/124 × 100 = 68.55%

From the above, we can see that Jake scored a higher percentage in the Maths test.

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3 years ago