1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
arsen [322]
3 years ago
15

Solve using EQUATIONS (with step by step explanation) 3x+y=-9 y=5x+7

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
8 0

Answer:

3x+y=-9= 0 then y=5x+7=0

Step-by-step explanation:

Slope=−

2.000

6.000

=−3.000

x−intercept=−

3

9

=−3

y−intercept=−

1

9

=−9.00000

=

2.000

10.000

=5.000

x−intercept=

−5

7

=−1.40000

y−intercept=

1

7

=7.00000 i believe

You might be interested in
What is the slope of the line shown in the graph below?
Flauer [41]
Slope = (y2-y1)/(x2-x1)
The points: (2,0) and (0,3)
(3-0)/(0-2) = 3/-2 = -3/2
The solution is -3/2
4 0
2 years ago
Read 2 more answers
Select the correct answer. What is the value of this expression if h = 8, j = -1, and k = –12?<br>​
Aliun [14]

Answer:

B- 12

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
According to a report from a business intelligence company, smartphone owners are using an average of 22 apps per month. Assume
Ira Lisetskai [31]

Answer:

0.4332 = 43.32% probability that the sample mean is between 21 and 22.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

According to a report from a business intelligence company, smartphone owners are using an average of 22 apps per month.

This means that \mu = 22

Standard deviation is 4:

This means that \sigma = 4

Sample of 36:

This means that n = 36, s = \frac{4}{sqrt{36}}

What is the probability that the sample mean is between 21 and 22?

This is the p-value of Z when X = 22 subtracted by the p-value of Z when X = 21.

X = 22

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{22 - 22}{\frac{4}{sqrt{36}}}

Z = 0

Z = 0 has a p-value of 0.5.

X = 21

Z = \frac{X - \mu}{s}

Z = \frac{21 - 22}{\frac{4}{sqrt{36}}}

Z = -1.5

Z = -1.5 has a p-value of 0.0668.

0.5 - 0.0668 = 0.4332

0.4332 = 43.32% probability that the sample mean is between 21 and 22.

4 0
2 years ago
The distance across the field is 200 m. Is the distance across the same field greater than or less than 20 km?
Ghella [55]
It is less than 20 km, because 20 km is equal to 20000 m
3 0
3 years ago
Read 2 more answers
Elearning homework i need it asap :
Fittoniya [83]

Answer:

12.30

Step-by-step explanation:

Soh Cah Toa

You know the angle, and the opposite. You want to find the adjacent. So you will you Toa.

tan(°) = O/A

tan(26°) = 6/A

Rearrange to get A on its own.

Atan(26°) = 6

A = 6/tan(26°)

A = 12.301 = 12.30 (2dp)

7 0
3 years ago
Other questions:
  • PLSSSS HELPP ASSPPPP!!!!
    15·1 answer
  • there are 18 bikes in a rack. there are 4 more blue bikes than yellow, and 2 less yellow bikes than green bikes. how many bikes
    5·1 answer
  • Find the zeros of the polynomial function f(x)=x^4-5x^3+11x^2-25x+30
    12·1 answer
  • What fraction in simplest form is equivalent to 0.45?
    7·1 answer
  • If a jet is moving at 178 mph, then how far will the jet move in 3 hours
    11·2 answers
  • How to find the perimeter and area
    10·1 answer
  • Shelia is dividing x4 – 4x3 + 4x2 – 6x + 5 by x – 1 using a division table. Quotient Divisor x3 – 3x2 + x – 5 x x4 –3x3 x2 A – 1
    12·1 answer
  • The scale on a map shows that 200 miles is represented by 5 inches on a map which proportion can be used to find the distance of
    8·1 answer
  • What is 3x + 4y = 10<br><br> 6x - 4y = 8
    7·1 answer
  • You start at (-4, 0). You move left 1 unit and down 5 units. Where do you end?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!