All categories

3 years ago

I WILL MARK AS BRAINLIEST! Solve for Y

Mathematics

2 answers:

zzz [600]3 years ago

7 0

Answer:

See below.

Step-by-step explanation:

Substitute the value for the variable and solve.

a.)

⇒ y = -5(3) + 17

⇒ y = -15 + 17

⇒ y = 2

b.)

⇒ y = 3(3) - 22

⇒ y = 9 - 22

⇒ y = -13

c.)

⇒ y = 2(3) - 25

⇒ y = 6 - 25

⇒ y = -19

d.)

⇒ y = 6(3) - 39

⇒ y = 18 - 39

⇒ y = -21

Marina86 [1]3 years ago

7 0

Answer:

X changes to Multiply symbol

Step-by-step explanation:

-5 X 3 + 17

-5 X 3 = -15

-15 + 17 = 2

3 X 3 - 22

3 X 3 = 9

9 - 22 = 13

2 X 3 -25

2 X 3 = 6

6 - 25 = 19

6 X 3 - 39

6 X 3 = 18

18 - 39 = -21

You might be interested in

A person's blood pressure is monitored by taking 3 readings daily. The probability distribution of his reading had a mean of 13

nexus9112 [7]

Answer:

a) The sampling distirbution has a mean of 135 and a standard deviation of 1.732.

b) The sampling distribution is also bell shaped, centered in the population mean. It has less spread that the population distribution because the standard deviation is smaller.

c) P(X>140)=0.002

Step-by-step explanation:

a) We are taking samples of size n=3, as we are taking 3 readings daily.

Each reading has a mean of 135 and a standard deviation of 3.

The sampling distribution depends on the population parameters and the sample size.

The mean of the sampling distribution is equal to the population mean. In this case, the mean of the sampling distribution is 135.

The standard deviation depends on the standard deviation of the population and the sample size, and is calculated as:

$\sigma_M=\dfrac{\sigma}{\sqrt{N}}=\dfrac{3}{\sqrt{3}}=1.732$

b) The sampling distribution is also bell shaped, centered in the population mean. It has less spread that the population distribution because the standard deviation is smaller.

c) The probability that the sample mean exceeds 140 can be calculated using the standard normal distribution.

First, we have to calculate the z-score for X=140. We use for this the mean and standard deviation of the sampling distribution.

$z=\dfrac{X-\mu_M}{\sigma_M}=\dfrac{140-135}{1.732}=\dfrac{5}{1.732}=2.887$

With this z-score, we can look up the probabilty in the standard normal distribution

$P(X>140)=P(z>2.887)=0.002$

3 0

3 years ago

Two sections of a class took the same quiz. Section A had 15 students who had a mean score of 80, and Section B had 20 students

Ksju [112]

Answer:

Step-by-step explanation:

In this question, we are asked to calculate the average mean score for a group of students split into two different emerging groups.

We calculate the total score for each of the groups. This is done by multiplying the average score by the number of students.

Total score of section A is 15 * 80 = 1,200

For section B, total score is 20 * 90 = 1,800

Overall score is thus 1200 + 1800 = 3000

We add the scores together and divide by the total number of students in both sections

Average score is thus 3000/35 = 85.71 which is approximately 86

3 0

3 years ago

Brainliest for correct answer

Tcecarenko [31]

1.not a function 2. Not a function 3.function

3 0

3 years ago

Can someone answer this question please please help me I really need it if it’s correct I will mark you brainliest .

Harman [31]

Formula for the perimeter of a quarter circle: C = ((pi x 2r) / 4) + 2r

C = ((3.14 x 18) / 4) + 18

C = (56.52 / 4) + 18

C = 14.13 + 18

C = 32.13 miles

Hope this helps! :)

5 0

3 years ago

These cones are similar. Find the volume

Serga [27]

Answer:

the answer is 44cm3

Step-by-step explanation:

you're welcome

6 0

2 years ago

Read 2 more answers