Mathematics High School

What is the solution to the system of equations?

6 x + 2 y = 6. 7 x + 3 y = 5.

Answers

Answer 1

Answer:

x = 2, y = -3

or

(2, -3)

Step-by-step explanation:

6x + 2y = 6

7x + 3y = 5

multiply the first equation by -3 and the second equation by 2 and solve by elimination

6x + 2y = 6

becomes

-18 - 6y = -18

7x + 3y = 5

becomes

14x + 6y = 10

then, add the new equations.

-18x - 6y = -18

14x + 6y = 10

-4x + 0 = -8

-4x = -8

4x = 8

x = 2

then, substitute x for 2 in one of the eqautions.

6x + 2y = 6

12 + 2y = 6

2y = 6 - 12

2y = -6

y = -3

Related Questions

12 over 2 - (-4 1 over 2 =

Answers

Answer:

26 1/2

or

26.5

Step-by-step explanation:

What is the area of the triangle?

Answers

Answer:

im pretty sure its 16 if its not im rlly sorry

Step-by-step explanation:

Carrie believes that if a and b are integers and b ≠ 0 then −a/b is always equal to a negative integer. Her conclusion is incorrect.


What correct conclusion can Carrie draw from the given information?


A The ratio will always be a positive integer.


B The ratio will never be a negative integer.


C The ratio will always be a rational number. It could be positive or negative.


D The ratio will sometimes be a rational number. It will always be negative.

Might give brainliest if the answer is correct!

Answers

Answer:

c

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

At the ice cream parlor there are thirty flavors, but for the last week they have only had 25 flavors.
Find the percent of change.

Answers

Answer: Percent change = 20%

===========================================================

Work Shown:

A = old value = 25 (last week's number)

B = new value = 30 (current week's number)

C = percent change

C = [ (B-A)/A ] * 100%

C = [ (30-25)/25 ] * 100%

C = [ 5/25 ] * 100%

C = 0.20* 100%

C = 20%

The percent change is 20%

The positive value of C indicates we have a percent increase.

Find g(-6) if g(x) = -5x – 2

Answers

Answer:

648=7

Step-by-step explanation:

I need help finding the equivalent expression​

Answers

Answer:

6(4c-1z)

Step-by-step explanation:

Help and get brainliest!

Answers

Answer:

I think it's either A or D

Step-by-step explanation:

I will mark you brainiest if you can answer this

Answers

Answer:

X would be 8

Step-by-step explanation:

The table shows the number of practice problems completed in 30 minutes in three samples of 10 randomly selected math students. Number of practice problems completed in 30 minutes Sample 1 14 15 16 17 16 15 16 15 17 18 Mean = 15.9 Sample 2 16 18 17 14 15 14 18 14 15 16 Mean = 15.7 Sample 3 18 14 16 15 15 14 17 15 19 13 Mean = 15.6 Which statement is most accurate based on the data? A. A prediction based on the data is not completely reliable, because the means are not the same. B. A prediction based on the data is reliable, because each sample has 10 data points. C. A prediction based on the data is not completely reliable, because the means are too close together. D. A prediction based on the data is reliable, because the means of the samples are close together.​

Answers

Answer:

A

Step-by-step explanation:

The statement which is most accurate based on the data is option(D)A prediction based on the data is reliable, because the means of the samples are close together.​

What is Mean?

Mean is the average of the given numbers and is calculated by dividing the sum of given numbers by the total number of numbers

From the given data,

Mean of the sample 1 = 15.9

Mean of the sample 2 = 15.7

Mean of the sample 3 = 15.6

All three mean are close together.

Therefore the data is reliable

Hence, the statement which is most accurate based on the data is option(D)A prediction based on the data is reliable, because the means of the samples are close together.​

Learn more about Mean here

https://brainly.com/question/13451489

#SPJ2

4E. There is an ample supply of identical blocks (as shown). Each block is constructed from four 1 × 1 × 1 unit-cubes glued whole-face to whole-face. What is the greatest number of such blocks that can be packed into a box that is 6 units tall, 7 units wide, and 8 units deep without exceeding the height of the box?

Answers

Answer:

72

Step-by-step explanation:

sdsa

Answer:

72

Step-by-step explanation:

The answer can also be 80 and 84.

Danielle is keeping track of the growth of a basil plant. The table below shows the measurements she made on different days. Day of Measurement 8 16 Height (cm) 42.2 59.0 69.5 88.4 98.9 21 30 35 What is the average rate of growth of the plant, in centimeters per day, from the 16th day to the 30th day? O A 2.95 cm B. 3.30 cm C. 2.10 cm D. 1.96 cm ​

Answers

Answer:

sorry cant help

Step-by-step explanation:

dfhwtuwrturyujyrtuytuypp

Answers

Uhh, what's the question?

Tickets to a show cost $5.50 for adults and $4.25 for students. A family is purchasing 2 adult tickets and 3 student tickets. Estimate the total cost.

Answers

Step-by-step explanation:

they paid 23.75 dollars. I hope it helps l!

Step-by-step explanation:

They paid 23.75 dollars. I really really hope this helps l!

Ellen drove 277.2 miles. For each gallon of gas, the car can travel 21 miles. How many gallons of gas did Ellen use?

Answers

Answer:

the answer is 13.2

Step-by-step explanation:

Answer:

13.2

Step-by-step explanation:

277.2÷21=13.2 gallons

If you were to get 25 out of 30 on this assignment, what percent would have scored?
​

Answers

if you got a 25 out of 30 on an assignment, you’d score an 83.3%. :)

11POINTS HELP Pretty Pwz

Answers

Answer:

the cube root of 512 is 8

Step-by-step explanation:

8×8×8=512

Answer:

8

Step-by-step explanation:

[tex]\sqrt[3]{512} =8[/tex]

All measures of the cube are the same so to get the volume u just multiply themselves 3 times x^3

What's the difference between 4 3/4 and 3 1/2

Answers

Answer:

The diffrence is that 4 3/4 is greater then 3 1/2 because if you take 4 by itself by 3 then 4 will 4 because the whole number is greater so their for the intier answer will be greater. 3 1/2 is less then 4 3/4 because the whole number is lower so their for the answer is less.

Step-by-step explanation:

I hop i helped you also if i did do it right may i get brainliest

solve the equation -4+4a=12 for a.

Answers

Answer:

4

Step-by-step explanation:

4 x 4 is 16 and then because of the negative you take away 4 so its 12.

Answer:

a=4

Step-by-step explanation:

-4+4a=12

add four to 12

4a=16

divide

FREE BRAINLIEST! if you can answer this correctly ill give you brainliest and answer some of the questions you have posted :) thank you very much!!! (22pts)

Answers

Answer:

14

Step-by-step explanation:

12 that is the answer
To the question

What is the value of X

Answers

Answer:

4 because

10+2x=18

2x=8

x=4

Quiana has 7 times more text messages from Yolanda than from Pierre. Quiana has 42 text messages from Yolanda. Which equation can be used to find how many text messages Quiana has from Pierre, p?

Answers

Answer:
Quiana has 8 text messages from Pierre.
Step-by-step explanation:
This question can be solved using a rule of three.
Quiana has 7 times more text messages from Yolanda than from Pierre.
This means that for each message that she receives from Pierre, she receives 7 from Yolanda.
She received 56 from Yolanda.
So
7 messages from Yolanda - 1 messages from Pierre
56 messages from Yolanda - x messages from Pierre



Quiana has 8 text messages from Pierre

A triangular pyramid has a base area of 24 square meter and heigh of 4 meters. what is the volume

Answers

Answer:

96 meters

Step-by-step explanation:

Volume means length x width x height and since it has already found the length and width, you multiply that by 4. So, 24 x 4 = 96

Answer:

32

Step-by-step explanation:

so volume =1/3 area of base times hieght that would be

1/3*96

32

a system of equation is shown x=10. 3x + 5y =20 what is the solution

Answers

Answer:

[tex](r,y) = (10, - 2)[/tex]

Step-by-step explanation:

[1]    x = 10

[2]    3x + 5y = 20

0? + x = 10        5? + 3x = 20  

Plz help, I'll give brainliest


Find the value of x​

Answers

Answer:

14.04

Step-by-step explanation:

[tex]19^{2}[/tex] - [tex]17^{2}[/tex] = 72

[tex]\sqrt{72}[/tex] = 8.48

8.48 + 8.48 = 16.96

31 - 16.96 = 14.04

Jake was the winner of -400 yard race he finished the race is 2 minutes let T represent the finishing times in minutes of the other participants who ran the race

Answers

Answer:

T > 2

Step-by-step explanation:

True or False: 2/7=10/35 *

Answers

Answer:

true

Step-by-step explanation:

Answer:

B False

Step-by-step explanation:

is equal to 0.28571428571

Question
Describe how you know if an equation has NO solutions. Give some examples of an equation that has no solutions.

Answers

Answer:

The constants are the numbers alone with no variables. If the coefficients are the same on both sides then the sides will not equal, therefore no solutions will occur. Use distributive property on the right side first.

Step-by-step explanation:

Hope this helped:).

How many bars of soap and toothbrushes are in each package? HHEEELLLPP!!!

Answers

hey you, i don’t think anyone can answer that with that little info...

write number 5 million 4 thousand 3 hundread in standard form

Answers

5 million, four thousand, three hundred in standard form is 5.0043 x 10^6

Solution:

Need to represent 5 million, four thousand, three hundered in standard form

5 million = 5000000

4 thousand = 4000

3 hundred = 300

5 million, four thousand, three hundred = 5000000 + 4000 + 300 = 5004300

In standard form, decimal comes after first digit and multiply to power of 10 dependency on total digits of number.

In our case, given number is 5004300.

So we need decimal after first and after that multiplying it by appropriate power of 10. So,

5004300 = 5.0043 x 10^6

Hence 5.0043 x 10^6 is standard form of 5004300 that is standard form of 5 million, four thousand, three hundred.

1
Select the correct text in the table.
Consider the following expression.
-102 + 5 + 3
2.12 + 4
Select the true statements.
The numerator has 3 terms.
The denominator includes a coefficient of 4.
The denominator includes a coefficient of 2.
The numerator has 2 terms.
The numerator includes a coefficient of 3.

Answers

Answer:

first and third statements

Step-by-step explanation:

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