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
Natalka [10]
4 years ago
7

6x-5y=22 y=-8 using systems of equations by substitution

Mathematics
2 answers:
Ivahew [28]4 years ago
5 0
\left \{ {{6x-5y=22} \atop {y=-8}} \right. \\\\ substitute\ y=-8\ into\ first\ equation\\\\
6x-5*(-8)=22\\\\
6x+40=22\ \ \ | subtract\ 40\\\\
6x=-18\ \ \ | divide\ by\ 6\\\\
x=-3\\\\
y=-8
Natasha_Volkova [10]4 years ago
3 0
We need to sub y=-8 into the first equation
6x+40=22
6x=-18
x=-3
You might be interested in
the correlation between two variables related to the same sample is a scaled quantitative measure. what is used to scale this me
Doss [256]

The correct option is the standard deviations of the variables.

What is correlation?

Any statistical relationship between two random variables or bivariate data, whether causal or not, is referred to in statistics as correlation or dependence.

Correlation is a term used to describe the linear relationship between two entities. When using a correlation tool, the variables must be present in quantities of two or more to test their relationship (degree of association).

In order to scale the measurement between two variables connected to a similar sample, the standard deviation measures dispersion.

The variables' standard deviations are the best choice as a result.

Option involving the standard errors of the variables is incorrect because standard error, which stands for standard deviation, determines the relationship between dependent and independent variables.

Option involving the coefficients of variation of two variables is incorrect because the coefficient expressing standard deviation and mean ratio determines how much variation there is.

Option The means of the variables are incorrect because they are not a scale for determining the correlation between two variables.

Hence, the correct option is the standard deviations of the variables.

To know more about correlation, click on the link

brainly.com/question/2088651

#SPJ4

Complete question:

The correlation between two variables related to the same sample is a scaled quantitative measure. What is used to scale this measurement?

- the standard deviations of the variables

- the standard errors of the variables

- the coefficients of variation of the two variables

- the means of the variables

6 0
2 years ago
Find the missing measures for the rectangle. l = _?_ w = 4.2 m A = 37.8 m2 P = _?_ A) 9 m; 26.4 m B) 14.7 m; 61.74 m C) 9 m; 13.
egoroff_w [7]

Answer:

The correct answer is A.

Step-by-step explanation:

The area of a rectangle can be calculated using the following formula:

Ar=W . I

If we know that the area measures 37.8 m^{2} and one side of the figure measures 4.2 m, we can say that:

37.8m^{2}=4.2m. I

We isolate the side we don't know:

\frac{37.8m^{2}}{4.2m} = I\\9 m = I

So I = 9 m

To know the perimter of a rectangle, we use the following formula:

P= I. 2 + W . 2

P= 9m. 2 + 4.2m. 2

P= 26.4 m

3 0
3 years ago
BRAINLIEST TO CORRECT
ella [17]

9514 1404 393

Answer:

  60

Step-by-step explanation:

Let x represent the number of members last summer. Then 90% more is 1.9x. We are told this is 114, so we have ...

  1.9x = 114

  x = 114/1.9 = 60

There were 60 members last summer.

6 0
3 years ago
What form is this equation in y= -3(x-5)^2+7 in?
Marianna [84]

Answer:

vertex form

Step-by-step explanation:

y= -3(x-5)^2+7

This equation is written in vertex form

y = a(x-h)^2 +k

The vertex is (h,k)

8 0
4 years ago
Read 2 more answers
For a consumer to obtain a 10% discount, he must spend an amount
DENIUS [597]

Answer:

the answer is 180 dollars

Step-by-step explanation:

20 is 10% of 200 so just subtract that

3 0
3 years ago
Other questions:
  • What is the slope for the equation y=7
    6·2 answers
  • Paco has a traditional health insurance plan. His deductible is $750. The level of co-insurance for his plan is 70/30 where 30 r
    5·2 answers
  • Is 8.33333333 a rational or irrational number
    5·1 answer
  • Simplify XY/YZ ??????
    8·2 answers
  • Simplify the following numerical expressions.
    10·1 answer
  • Mia drove 824 miles on 34.8 gallons of gas. What was her gas mileage, rounded to the nearest mpg?
    10·2 answers
  • Factorise 9a3 b + ba2
    8·1 answer
  • Solve k-73 0.Graph the solution<br> The solution is
    12·1 answer
  • Write the sentence as an equation.<br> The sum of 24 and x is - 20.
    15·2 answers
  • If the area of a rectangle is x^2+13x+36 and the length is x+9 what is the width
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!