Consider the system of equations.

5x + 2y = 12
5x – 2y = 28

What is the solution to the system of equations? Show work using substitution or elimination to support your answer.

A (4, -4)

B (-4, 4)

C (5, -6.5)

D (4, 16)

Answers

Answer 1

Answer:

A. (4, -4)

Step-by-step explanation:

Equation form x = 4, y = −4

Answer 2

Answer:

Option A

Step-by-step explanation:

5x + 2 y = 12 -----------(I)

5x - 2y = 28 ------------(II)

Add equation (I) & (II). So, y will be eliminated and we will get the value of x

(I)     5x + 2y = 12

(II)     5x -2y  = 28    {Now add}

         10x      =  40

                  x = 40/10

x = 4

Plugin x = 4 in equation (I)

5*4 + 2y = 12

20 + 2y = 12

        2y = 12 - 20

        2y = -8

          y = -8/2

y = -4


Related Questions

The baby lions at the zoo are growing. For the first 4 months, they eat 10 ounces of food per day. Every month after that, the amount of daily food is multiplied by 1.5. How much will the lions eat per day during month 10? When will the lions eat more than 5 pounds per day?

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Answer:

48.3

Step-by-step explanation:

How to increase 78 by 80%

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Suppose a normal distribution has a mean of 50 and a standard deviation of
3. What is P(x <47)?
A. 0.16
B. 0.025
C. 0.975
D. 0.84

Answers

Answer: A

0.16

Step-by-step explanation:

just took it

can someone please help me i need help

Answers

Answer:

None

Step-by-step explanation:

It would be easier to ask your teacher instead of getting wrong answers from random people. Ever think of that :0

Write 3.7 as a fraction

Answers

Answer:

37/10

Step-by-step explanation:

brainliest plz

for first answering

Answer:

3 7/10

Step-by-step explanation:

️️️️️️️️️️️

Evaluate for b

50 = -1/3b + 20

Answers

Answer:

50=−13⋅+20

Step-by-step explanation:

8.5 inches to centimeters

Answers

answer: 21.59

I hope this helps! Let me know if you have any questions! Good luck on the rest of your assessment!

Mark this as Brainliest (if i helped of course) if you get a chance:)

Answer:

21.59cm

Step-by-step explanation:

Multiply 8.5 by 2.54 to convert in. to cm.

The formula F=95C+32 changes a temperature reading from the Celsius scale C to the Fahrenheit scale F. What is the temperature measured in degrees Fahrenheit when the Celsius temperature is 50°C?

Answers

Answer:

122°F

Step-by-step explanation:

F=(50×9/5)+32

= 122°F

what is the amount of water in the aquarium at 0 minutes

Answers

Answer:

I would guess it would be 0 but is there a graph or background info

?

Step-by-step explanation:

What is the equation of the line with a gradient of −2 which passes through the point (3, −5)?

Answers

Answer:

y= mx + c

Step-by-step explanation:

y=mx+c

y= -2x+c

-5 = -2(3) +c

-5 = -6 +c

-5 + 6 = c

1 = c

therfore equation is y = -2x + 1

you walk into a room.on the bed,there 2 dogs, 4 cat, a girrafe, 5 cows and a duck.there are also three chickens flying above the bed.how many legs are on the floor ?

Answers

Answer:

50 legs

Step-by-step explanation:

We know that a dog has 4 legs, a cat has 4 legs, a giraffe has 4 legs, a duck has 2 legs, and a chicken has 2 legs. So, we want to calculate [tex]2(4)+4(4)+1(4)+5(4)+1(2)+3(2)[/tex], right?

Wrong! It's a trick question! The chickens aren't on the floor, so they don't count. So, we really want [tex]2(4)+4(4)+1(4)+5(4)+1(2)[/tex].

We multiply it out to get [tex]8+16+4+20+2[/tex].

We add these up to get [tex]50[/tex].

So, our answer is [tex]\boxed{50}[/tex] legs.

6a) find the value of x in the following proportions. a) 3:5=12:x b) 4:3=20:x c) 5:6=x:12 d) 7:2=x:6​

Answers

Answer:

A. x = 20

B.x = 15

C. x = 10

D. x = 21

Step-by-step explanation:

In pic they are in order

(Credit: Symbolab)

(Hope this helps can I pls have brainlist (crown)☺️)

5.5.WW3
Question Help
Find the quotient
30)593
Select the correct choice below and fill in the answer box(es) within your choice.
OA. The quotient is
OB. The quotient is
R

Answers

19.7666
Because it just makes since I think

30 POINTS AND BRAINLEST FOR ANSWER HELP!!!!!

Answers

Answer:

a

Step-by-step explanation:

Are the ratios 2:3 and 4:6 equivalent? Explain your answer.
PLSS HELP ME

Answers

Answer: Yes

Step-by-step explanation:

2:3 is the same as (2/3) and 4:6 is the same as (4/6). (4/6) can be reduced by dividing both sides by 1/22: (4/6)*(1/2)/(1/2) = 2/3, They are the same.

what number is represented by each point on the number line

Answers

Answer:

Every point of a number line is assumed to correspond to a real number, and every real number to a point. The integers are often shown as specially-marked points evenly spaced on the line.

please help asap, this is for a math project! (ill give brainliest)
Write 7/571 as a mixed number!

Answers

Answer:

7

Step-by-step explanation:

jh

Answer:

7+32/77

Step-by-step explanation:

Pls anyone know this

Answers

He can make
526
562
265
256
652
625
Answer:
256
265
526
562
625
652

I think that’s it. Hope this helps

Evaluate -5x+8 when x=3 The value of the expression is

Answers

Answer:

-7

Step-by-step explanation:

replace x by 3

-5^3+8

-15+8

=-7

the answer is -7
-5x+8
-5(3)+8
-15+8
-17

Using the slope formula, find the slope of the line through the given points.
(12,0) and (4,-6)

Answers

Answer:

Step-by-step explanation:

gradient = y2-y1/x2-x1

-6-0/4-12

-6/-8

=3/4

(5,6) and (6,8) equation of line​

Answers

Hdjdjdjdbdhdjdjdjdjdjjdirhebdudbxjd chbduxbxbdhxbxh

the square root of negative 9 is not negative 3 because..​

Answers

Answer:

You cant have a negative square root

Explanation:

The answers will always be positive or a perfect square

Hope this Helps

Find the measures of the four angles below.

Answers

Answer:

x = 38.8

Step-by-step explanation:

You are running a fuel economy study. One of the cars you find is blue. It can travel 30 1/2 miles on 1 1/4 of gasoline. Another car is red. It can travel 27 1/5 on 4/5 of gasoline. What is the unit rate for miles per gallon for each​ car? Which car could travel the greater distance on 1 gallon of​ gasoline?

Answers

You are running a fuel economy study. One of the cars you find is blue. It can travel 30 and one half miles30 1 2 miles on 1 and one fourth gallons1 1 4 gallons of gasoline. Another car is red. It can travel 25 and three fifths miles25 3 5 miles on four fifths gallon 4 5 gallon of gasoline. What is the unit rate for miles per gallon for each​ car? Which car could travel the greater distance on 1 gallon1 gallon of​ gasoline?

 

Blue car: 30.5 / 1.25 =24.4 miles per gallon

Red car: 25.6/0.80   =32 miles per gallon

You can easily see that the Red car travel farther on 1 gallon of gasoline.

Answer:

The unit rate for the blue car is 24 2/5 and The unit rate for the red car is 34

Use the following function rule to find f(81).


Answers

Answer:

1

Step-by-step explanation:

x/81

x=81

81÷81=1

--------------------

HELP ASAP PLEASE I BEG TOU

Answers

Answer:

(0,-2)

(2,-1)

(4,0)

Step-by-step explanation:

The points are the above ones.

x intercept: (4, 0)

y intercept: (0, -2)

What is the approximate value of the number below rounded to the
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37
——
√144

Answers

Answer:

3.08

Step-by-step explanation:

because 144 is a squre root of 12

Use a model to explain why any number – (–7) is the same as that number + 7.

(PLEASEEEE HELPPP)

Answers

Answer:

say you buy something for 10 dollars, you are going to get charged for it, but if you take item off of your shopping cart you are taking away the -10 dollars that wouldve been charged.

Step-by-step explanation:

the reason this works is because you take away something that makes it less.

- (-7) is basically just saying delete that -7. that's why - (-7) is the same as +7

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Answers

I think its A. trust me. peksman. tiwala lang. kasi a function should be unique domains

If Rosa walks 3 miles in 40 minutes, then Rosa will walk how far in 70 minutes if she walks at the same
speed the whole time? If necessary, round your answer to the nearest tenth of a mile.
miles.

Answers

Answer:

5.25 miles.

Step-by-step explanation:

1) Rosa spends 10 minutes in 3/4=0.75 miles, then

2) Rosa can spend 70 in 0.75*7=5.25 miles.

Answer:

5.3 miles

Step-by-step explanation:

3miles/40min =x miles/70min

cross multiply the fractions

3*70 = 40*x

210=40x

divide by 40 on both sides

210/40 = 5.25

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