Solve the system of linear equations using elimination.

10x + 7y = 12
8x + 7y = 18
A) (3, 6)
B) (3, −6)
C) (−3, 6)
D) (−3, −6)​

Answers

Answer 1

Answer:

C. (-3,6)

Step-by-step explanation:

Take 10x + 7y = 12 as first equation and 8x + 7y = 18 as second equation.

Subtracting both equations, you will get

10x + 7y - 8x - 7y = 12 - 18

2x = -6

x = -3

Substitute value of 'x' in any of the given equation :-

10x + 7y = 12

10 * -3 + 7y = 12

7y = 12 + 30

y = 42/7

y = 6

Answer 2

Answer:

C) (−3, 6)

Step-by-step explanation:

10x + 7y = 12 ___ (−3, 6)

10×(-3) + 7×6 = -30 + 42 = 42 - 30 = 12

8x + 7y = 18 ___ (−3, 6)

(-3) + 7×6 = -24 + 42 = 42 - 24 = 18


Related Questions



HELP IM BEING TIMED!!!

Sandwiches
Part A
What is the cost, in dollars, of one sandwich
Enter your answer in the space provided,

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Answer:

4 dollars!!

Step-by-step explanation:

Answer:

$4 ez what kinda question was this

Step-by-step explanation:

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Answer:

if I am correct 2/3 is bigger than 0.65

and I think 5.5 is smaller than 5 3/7

and I think the order goes 3/8 5/6 1/2

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Answer:

y = -x²+8x+16

Step-by-step explanation:

see this equation when graphed, it meets both criteria

the changes in Mr. Connor’s bank account for five days are $50.25, -$22.50, $50.25, -22.50, and -22.50. What is the mean change in his bank account? show your work

Answers

Answer:

8.6

Step-by-step explanation:

-22.50 x 3 = -67.50

50.25 x 2 = 100.50

100.50 + -67.50 = $43

43 divided by 5

=8.6

Hope this helps :)

The mean change in Connor's bank account is $6.6.

What is mean?

Mean is an average of values of a set. Arithmetic mean, geometric mean and harmonic mean are the type of mean.

Given that,

Changes in Mr. Connor's bank  account for five days are $50.25, -$22.50, $50.25, -22.50, and -22.50.

To find mean change in Connor's bank account,

First determine total change in Connor's bank account

Total change = 50.25 -22.50 + 50.25  - 22.50 - 22.50

                      = 33

Mean change = total change/ number of days

Mean change = 33/5

                       = 6.6

To learn more about Mean on:

https://brainly.com/question/27824219

#SPJ2

An online furniture store sells chairs for $50 each and tables for
$600 each. Every day, the store must sell more than $9300 worth
of chairs and tables.
O A. >
B. <.
C.s
D. >

Answers

Answer:

If you were to write an equation for this then the equation would be

50x+600y>9300

So if you are looking for the inequality symbol then the answer would be

    >

Thank you

Mark this brainliest

Using t and c as variables, we get

100c + 400t ≥ 5400

Simplified,

100(c + 4t) ≥ 5400

c + 4t ≥ 54

To find the minimum number of chairs that need to be sold, we evaluate using t = 0

c + 4(0) ≥ 54

c ≥ 54

To find the minimum number of tables that need to be sold, we evaluate using c = 0

(0) + 4t ≥ 54

4t ≥ 54

t ≥ 13.5 Since we can't purchase half a chair, we round up our result giving us t ≥ 14

Find the distance between the pair of points (2,9) and (3,8).

Answers

Answer:

[tex]\sqrt{2}[/tex] units

Step-by-step explanation:

To find the distance between a pair of points, use the distance formula, [tex]d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]. Substitute the x and y values of (2,9) and (3,8) into the formula and simplify:

[tex]d = \sqrt{(8-9)^2+(3-2)^2} \\d = \sqrt{(-1)^2+(1)^2} \\d = \sqrt{1+1} \\d= \sqrt{2}[/tex]

So, the distance is [tex]\sqrt{2}[/tex] units.

11) Wayne exercised for 5/6 of an hour in the morning and 1/3 of an hour in the evening. How much more of an hour did Wayne spend exercising in the morning than in the evening? *

Answers

He spent 3/6 hours more or 30 minutes more

4.
Find the rate of change for the situation. You run 7 miles in one hour and 14 miles in two hours.


A. 7 miles per hour

B. 2 hours

C. 2 miles per hour

D. 7 miles

Answers

Answer:

The answer is A.

To find speed/rate of change, divide distance by time.

7 mi/ 1 hour= 7 mph

14 mi/2 hour= 7mph

Step-by-step explanation:

Answer: A.7 miles per hour

Step-by-step explanation:

Given: You run 7 miles in one hour and 14 miles in two hours.

We know that .. The rate of change of function= (change in distance)/(change in time)

Therefore, the rate of change of function for the given situation= (14-7)/(2-1)= (7)/(1)

Hence the rate of change of function for the given situation= 7 miles per hour.

The answer is A. 7 miles per hour

answer both for ( brain list, thanks, 5 star review)

Answers

Answer:

1. 1 1/12

2. 1/10

Answer:

1. or 1 or 1.083

2. or 0.1

Step-by-step explanation:

Solve 65x = -85 No decimals or mixed numbers

Answers

Answer:

1.30769230769 simplifird into not a decimal or mixed number is your answer. do the work.

Answer:

-17/13 would be your answer.

Micah jogged 8/10 of a mile. Sarah jogged 3 times this distance. How far did Sarah jog?

Answers

Answer:

8/10 * 3 = (8*3)/10 = 24/10 = 2.4 miles

Step-by-step explanation:

24/10 = 2 4/10 = 2 1/5

When multiplying a whole number times a fraction, the denominator stays the same.

-3y > x +18
y 2-4x
m=
3/1

Answers

Answer:

there is no m in the question

Step-by-step explanation:

the table shows the height of the volleyball players from two schools what is the difference of the mean of height of the two team ​

Answers

Answer:

3.9

Step-by-step explanation:

George, Matthew and Isabelle invest money in a savings account, which pays compound interest of 3% p.A

Answers

The question is incomplete. The complete question is :

George, Matthew and Isabelle invest money in a savings account, which pays compound interest of 3% p.a.

a). George invested £ 4800. Work out the total value of his investment after 5 years.

Solution :

It is given that :

George invested amount of, P = £ 4800

Time of investment, t = 5 years

Rate of interest, r = 3 % p. a.

The total value will be :

[tex]$A=P(1+\frac{r}{100})^t$[/tex]

[tex]$A=4800(1+\frac{3}{100})^5$[/tex]

[tex]$A=4800\times (1.03)^5$[/tex]

[tex]A = 4800 \times 1.1592[/tex]

   = 5564.16

Therefore the total value after 5 years = £ 5564.16

the exponent of 2√9 is

Answers

Answer:

the exponent is 6............

help plz worth 12 points

Answers

Answer:

4. 0.957 square meters

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Step-by-step explanation:

4. l*w=area

1.2*2.4=2.88

2.88=pi*r^2

0.917=r^2

0.957=r

5. diameters have to be 8cm for three to touch to get to 24cm, because 8*3=24.

radius=1/2 diameter, so radius=4cm

WHAT IS 4h divided by 5h

Answers

Answer:

4/5h

Step-by-step explanation:

how do I solve 6 8/9 - 5 2/3?​

Answers

Answer:

11/9 or  1 2/9 as a mixed number

Step-by-step explanation:

Answer:

11/9

Step-by-step explanation:

answer asap pllllssssssss​

Answers

Answer:

11x+3

Step-by-step explanation:

combine like terms

8x+3x = 11x

5-2= 3

combine

11x+3

Answer:

11x+3

Step-by-step explanation:

8x+5+3x-2

8x+3x= 11x

5+-2=3

answer: 11x+3

If 0 is an angle in standard position and its terminal side passes
through the point (-7,-24), find the exact value of tan e in
simplest radical form.

Answers

Answer:-27/7

Step-by-step explanation:

Independent Practice


Simplify the expression. 8 +2 2


A.
8 28 square root of 2


B.
4 2


C.
2 10


D.
6 26 square root of 2

Answers

Answer:

B.

4 2

Step-by-step explanation:

Simplify the expression.

9-fraction

The result can be shown in multiple forms.

Exact Form:

8

+

2

2

Decimal Form:

10.82842712-square root

Simplify the expression.

8- subtracting

Simplify the expression.

12-addition

Evaluate.

30

=

30

The equation is always true.

True

Ben is making 12 fruit drinks. each drink uses 2/3 of a bottle f orange juice and 1/4 of a bottle of pineapple juice. What is the total number of bottles of orange and pinepple juice ben should buy

Answers

1 drink 2/3 oj
12 drinks x
X= 2/3 • 12
X=24/3
X= 8 orange juice bottles

1 drink 1/4 pj
12 drinks X
X=12•1/4
X=12/4
X= 3 pineapple bottles

Rewrite 10x + 7x - 5 (3x) − ( - 3y)

Answers

Answer:

2x + 3y

Step-by-step explanation:

10x + 7x - 15x + 3y=

17 x - 15 x + 3y

2x + 3y

Enter a fraction equivalent to 0.4. Use only whole numbers for numerators and denominators.

Answers

Answer:

2/5

Step-by-step explanation

!s the answer.

if mary had 40000 and jane took 40000 how many cookies do he got left

Answers

He would have 0 cookies jane took all of them so your answer would be 0

Mhanifa please help me with this? I will mark brainliest!

Answers

Answer:

C. 20

Step-by-step explanation:

If the entire angle is 47° (AOC) and a part of it is 27° (BOC) then you subtract 47 - 27 to get the answer which is 20°

The answer c. 20°

What does 1.75 represent in the second expression?
A)represents the height of the plant in feet after d days
B)represents the initial height of the second plant, in feet
C)represents how fast the plant is growing after d days

Answers

Answer:

B

Step-by-step explanation:

sana nakatulong mga lods

Help please!! I need to do it for today!!

Answers

Answer:

Hey! So I have attached a picture of me doing it. I have highlighted 1 question's answer in really light sky blue color and 2 question's answer in lake blue color. Hope this helps and stay safe, happy, and healthy, thank you :) !!

BRAINLY FOR CORRECT ANSWER

Answers

Answer:

a

Step-by-step explanation:

Step-by-step explanation:

I think it's B . But I'm not sure so I hope that I helped you

 What is the equation of the line pictured in slope intercept form?

Answers

Answer:

y=1/3x+4

Step-by-step explanation:

y = -1/3x + 4Point A is located at 0,4Point B is located at 6,24 - 2 = 2 (That's the difference in y)0 - 6 = -6 (That's the difference in x)2/-6 simplifies to -1/3So, -1/3 is the SLOPEThe y-intercept equals 4ANSWER: y = -1/3x + 4Please let me know if I am wrong on anything.
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