Which coordinate grid shows the graph of

Please help me answer all parts of the question in the photo.

Vika [28.1K]

$6-4i\\3-6i+4i=3-2i\\3+4i-2+i=3-2+4i+i=1+5i$

5 0

3 years ago

Which of the equations below represents a line parallel to the y-axis?

Rudik [331]

Answer:

The line parallel to y – axis is x = 4. Thus option a is correct.

Solution:

Given, a set of options as linear equations.

We have to choose one which is parallel to the y – axis.

We know that, slope of y – axis is undefined.

As the required line is parallel to the y – axis, its slope should also be equal to slope of y – axis.

Now, let us check one by one option.

Now, a) x = 4

$\rightarrow \text { slope }=\frac{-x \text { coeffiecient }}{y \text { coefficient }}=\frac{-1}{0}$

= undefined

Here slope of this line is undefined. Which means it is parallel to y – axis.

So, we got our required answer.

Hence, the line parallel to y – axis is x = 4 i.e. option a is correct.

7 0

4 years ago

Suppose a quiz has 12 multiple choice questions. Each question has 4 answer choices. If a student takes the quiz and randomly gu

Gnoma [55]

The probability that the student gets between 1 and 6, exclusive, questions correct will be 0.7872...

Explanation

If the probability of success is $p$ , then the probability of $r$ successes in $n$ trials will be......

$P = ^nC_{r}*(p)^r (1-p)^n^-^r$

Here, the quiz has total 12 questions and each question has 4 answer choices. So, $n=12$ and $p=\frac{1}{4}= 0.25$

The student gets between 1 and 6, exclusive, questions correct. It means there can be 2 or 3 or 4 or 5 questions as correct. So....

The probability of 2 or 3 or 4 or 5 questions correct will be:

$=^1^2C_{2}*(0.25)^2(1-0.25)^1^0 + ^1^2C_{3}*(0.25)^3(1-0.25)^9 +^1^2C_{4}*(0.25)^4(1-0.25)^8+^1^2C_{5}*(0.25)^5(1-0.25)^7\\ \\ =0.2322...+0.2581...+0.1935...+0.1032... \\ \\ =0.7872...$

3 0

3 years ago

A manufacturer claims that its cleaning product is best because over half of the cleaning services surveyed used the product. Wh

balu736 [363]

Answer:

D. Only one cleaning product was asked about in the survey.

Any given company can use more than one cleaning product or even use a combination of different cleaning products. The question was not specific enough, since it should have probably asked which cleaning products are used and which ones are used more frequently.

Step-by-step explanation:

the other options are wrong because:

A. Only 50 cleaning services were surveyed. ⇒ This actually would increase the validity of the claim because it satisfies the the condition for a valid confidence interval [np and n(1 - p) are larger than 10]-
B. Cleaning services were selected at random. ⇒ This actually would increase the validity of the claim.
C. A well-known company conducted the survey. ⇒ This actually would increase the validity of the claim.

8 0

3 years ago

ANOTHER ONE!!! WHOEVER SLOVES THIS IS A LIFESAVER <3

White raven [17]

Answer:

1. 70

2. 54

3. 54

4. 40

Step-by-step explanation:

4 0

3 years ago

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