Mathematics Middle School

Solve x+ y = 5 and 2 x - y = 3

Answers

Answer 1

Answer:

\( x=\frac{8}{3}\: \: y=\frac{7}{3}\)

Step-by-step explanation:

Add the two equations:

$ x+y +(2x-y)=5+3$

$\implies 3x=8$

$\implies x=\frac{8}{3}$

Use this value in the first equation:

$\frac{8}{3}+y=5$

$\implies y=\frac{15-8}{3}=\frac{7}{3}$

Answer 2

Answer:

x + y = 5 Equation 1

2x-y = 3 Equation 2

Add both Equations

y will be eliminated so it will be

3x = 8

x = 8/3

Substitute x into equation 1

8/3 + y = 5

y = 5 - 8/3

y= 7/3

x = 8/3 y = 7/3

Related Questions

Derek wants to practice playing the guitar for 9 hours in 8 days. Which of the following statements match the given ratio for guitar practice?

A.

32 hours in 36 days

B.

30 hours in 28 days

C.

27 hours in 24 days

D.

36 hours in 26 days

Answers

Answer:

The answer is C.

Reasoning:

No other numbers match up but D)

When you divide 24 by 8 you get 3 and 3 times 9 is 27

Answer:

D.Reasoning

Step-by-step explanation:

How can I find the cube root of 64?

Answers

Answer:

4

Step-by-step explanation:

The cube root of 64 is the number which when multiplied by itself three times gives the product as 64. Since 64 can be expressed as 2 × 2 × 2 × 2 × 2 × 2. Therefore, the cube root of 64 = ∛(2 × 2 × 2 × 2 × 2 × 2) = 4.

The cube root of 64 is 4.

Before solving the question, let's understand the concept of cube root.

The cube root of a number is the value obtained by multiplying it by itself three times or thrice. When we multiply 3 by itself three times, we get 3 x 3 x 3 = 27 = 3³, so the cube root of 27 is 3. Thus, we can say that the cube root gives a value that is basically cubed.

The cube root is denoted by ∛

Now, we will find the cube root of 64.

Firstly, we have to find factor 64.

64 = 2 × 2 × 2 × 2 × 2 × 2.

64 = ∛4³

64 = 4

Therefore, the cube root of 64 is 4.

To know more about cube root:

https://brainly.com/question/12105008

The points on the graphs represent relations. Classify these relations according to whether or not they are functions. (3)

The points on the graphs represent relations. Classify these relations according to whether or not they

Answers

Answer:

here

Step-by-step explanation:

Answer:1 and 2 is a function. But the third one isn't. explanation: When there is more than one point on a vertical line that is not a function.

The box plots shown represent the average mileage of two different types of cars. Use the box plots to compare the data sets.

Drag each value to show if it is greater for SUVs, greater for sedans, or if there is not enough information to tell.

The box plots shown represent the average mileage of two different types of cars. Use the box plots to

Answers

Answer:

Step-by-step explanation:

A cereal box has a height of 32 centimeters. It has a base with an area of 160 square centimeters.

What is the volume, in cubic centimeters, of the cereal box?

Please help me I will give you the brain thing with extra points, please help me. 3/5

Please help me I will give you the brain thing with extra points, please help me. 3/5

Answers

I think it’s C, try that.

Answer:

C) (x, y)->(-x, -y)

Step-by-step explanation:

This is a reflection

Can Someone Help Me Please? I am offering 100 points!
Geraldine is graphing the inequality x less-than 6. Which statements below describe steps she may take to graph the inequality correctly? Check all that apply.
Draw an open circle at 6.
Draw a closed circle at 6.
Shade all numbers less than 6.
Shade all numbers greater than 6.
Shade all numbers to the right of 6.
Shade all numbers to the left of 6.

Answers

Answer:

shade all numbers less than 6

shade all numbers to the left of 6

Step-by-step explanation:

i believe this is the answer because if you graph x<6, you can see that the shaded area is to the left of 6 (numbers less than 6).
Desmos graphing calculator helps

Answer:

3, & 6

Step-by-step explanation:

Judy travels between her school and her home. She starts riding her bike at 4:00 pm, going at 20 miles per hour. At 4:30 pm, she locks her bike and finishes on foot for the remaining 0.2 miles. How far is her school from home?

Judy travels between her school and her home. She starts riding her bike at 4:00 pm, going at 20 miles

Answers

Answer:

3 miles

Step-by-step explanation:

Answer: 10.2
Explanation: she going at 20mph and goes for half an hour resulting in going 10 miles and she has 0.2 left to go

Mr. Smith opened a retirement account with a deposit of $900. This account earns 5% simple interest annually. How many years will it take for his $900 deposit to earn $360 interest?

Answers

your answer should be 6 years!
Principal (P) = $900
Rate of interest (R) = 5%
S.I = $360
Time =?

Formula to find the time=
T= 100 x S.I / P x R


T= 100 x 360 / 900 x 5
T= 36000/4500
T= 8 years

I don't get what they mean by "Coach Green could possibly have
7,9, or 12 players on her team." It definitely not 12 I think but I really don't get it

I don't get what they mean by "Coach Green could possibly have 7,9, or 12 players on her team." It definitely

Answers

Answer:

the answer is 7 as 7 is not divisible by anythign exept for one

Step-by-step explanation:

Write the word sentence as an inequality. Then solve the inequality.

Four times a number x is at least −12.

Answers

the answer is 4x>_-12. the underscore is the line under the “>”

Answer:

-3

Step-by-step explanation:

-12 divided by 4 -3

Create a histogram that shows this information.

Create a histogram that shows this information.

Answers

Answer:

Step-by-step explanation:

Answer:

Explanation:

Answer:

Explanation:

Answer:

Explanation:

Answer:

Explanation:

Answer: YOUR MOM

Step-by-step explanation:

plz help its been two days no one helped me busy life

plz help its been two days no one helped me busy life

Answers

I agree when you plug in the formula A=hb/2=14•12.2/2 = 85.4

Please help me!!!!!!

Please help me!!!!!!

Answers

Answer:

this is the answer :621cm²

Step-by-step explanation:

23×27=621cm²

Answer:

Step-by-step explanation:

Area of the parallelogram = Area of rectangle

bh = lb

We can make a rectangle from a parallelogram.

So, Area of parallelogram = bh

27*23

= 621 sq. cm

Hope it helped. Pls mark me the BRAINLIEST!

Logan buys 3 dozen donuts. Each dozen costs $2.39. He pays with a $10 bill. How much change will Logan receive? ​

Answers

3*2.39= 7.17
10-7.17= 2.83
he’ll get $2.83 back in change

Answer:

He will get $2.83 back in return for a $10 bill.

Step-by-step explanation:

3 x 2.39=7.17

10.00 - 7.17=2.83

So, he will get $2.83 back.

-5(-6y-3x)

Can you guys please help me. I can never do these. I need the answer by 5:55, please. Thank you guys so much!

Answers

Answer:

Step-b1

15    +  3 0y

y-step explanation:

Well I think the answer must be 30

The circumference of a circle is 5(pie). Which of these correctly states the diameter? Please explain and dont just write the letter.
A: 1/5
B: 2/5
C: 5
D: 10

Answers

Answer: C. 5

Step-by-step explanation:See the attached picture.

The circumference of a circle is 5(pie). Which of these correctly states the diameter? Please explain
The answer is c. 5 states the diameter

Jasper kept track of how long he had to wait for a train. The data below shows the wait time in minutes for 5 days.

Answers

What exactly are we trying to answer?

He waited for more than 5 days I think if I’m wrong I need a chart

Devaughn's age is two times Sydney's age. The sum of their ages is 57 . What is Sydney's age?

Answers

Answer:

sydney age is 19yrs

Step-by-step explanation:

2x+x=57

3x=57

x=57/3

x=19

sydney age is 19yrs

Devaughn's age is 2x=2(19)=38

Answer:

Sydney is 19yrs old

Step-by-step explanation:

Which is the more reasonable measurement of the distance between the tracks on a DVD: 7.4 ⋅ 10−4 mm or 7.4 ⋅ 104 mm? Justify your answer.

Answers

Answer:

A- 7.4 ⋅ 10−4 mm

Step-by-step explanation:

Well, to solve this problem, we must convert the number and / or the units in a more imaginable one.

We are given two choices:

a. 7.4 x 10^-4 mm

b. 7.4 x 10^4 mm

Converting the units and numbers into meters and general form, respectively. (What is meant by general form is not to write it in scientific notation).

a. 7.4 x 10^-4 mm (1 m / 1000 mm) = 0.00000074 m

b. 7.4 x 10^4 mm (1 m / 1000 mm) = 74 m

Now comparing the two values above, what do you think is the distance between the tracks on a DVD? Definitely NOT 74 m or else the DVD is extremely big. Therefore the correct is the smaller one.

Answer:

desdrgtfyguhijokhbgftrdszxfcghbjklmmjhugtfdszxbnm

Step-by-step explanation:

uhgfdfcyhuihygtfy78ytrer68trdxtygnbjmn b

Mary and Jim collect baseball cards. Mary has five more than three times as many cards as Jim. The total number of cards they both have is 147. How many cards do they each have?


Please give me a right answer I will give 100 pt and brainliest

Answers

Answer:

m = 111.5

j = 35.5

I really hope this is right ;(

Step-by-step explanation:

m = 3j + 5


j + 3j + 5 = 147
4j + 5 = 147
4j = 142
142 ÷ 4 = 35.5

So j = 35.5

3(35.5) + 5 = 111.5

3(35.5) + 5 = the answer is 111.5

Scale drawing of the gym.

A rectangle with length 9 centimeters and width 4 centimeters.

StartFraction 1 centimeter over 10 meters EndFraction = StartFraction 9 centimeters over new length EndFraction. (1) (new length) = (10) (9). New length = 90 meters.

Using the scale of 1 cm: 5 meters, Tamara calculated the length of her old gym to be 45 meters and the width to be 20 meters.

Using a new scale, 1 cm: 10 meters, she found the length of the new gym to be 90 meters.



The width of the new gym is
6
14
40
90
meters.
The length and width of the new gym are
2
4
45
90
times the length and width of the old gym.

Answers

Answer:

The width of the new gym is

✔ 40

meters.

The length and width of the new gym are

✔ 2

times the length and width of the old gym.

Step-by-step explanation:

1 sixth + 1 third + 5 twelfths

Answers

Answer:

11/12

Step-by-step explanation:

You need to find the least common multiple of all three denominators, and then multiply the fractions to meet eachother.

Hope that helps!

Answer:

11/12

Step-by-step explanation:

A straight line is a function if it can be written in the form y = mx + b.

Question 1 options:
True
False

Answers

True that’s the answer
The answer is True. Hope this helps

We are learning Dividing with fractions

We are learning Dividing with fractions

Answers

There A method my teacher taught me it’s called KCf which kcf keep change flip which you keep your first fraction like 1/4and 2/3 You change the 2/3 to 3/2 ok Hope that helps you

Answer:

1. The numerator

2. the denominator of the fraction

3. 6/8

4. 2 badges

Step-by-step explanation: for number 4

Mr.Garcia is making badges. Each badge has 3/8 yards of ribbon. He starts with 3/4 yard of ribbon. We need to find how many badges he can make. The length of each badge is 3/8 yard of ribbon. The total length of the ribbon is 3/4 yard. To find the number of the badges is the quotient of the division of the total length of the ribbon by the length of each badge. The number of badges =  the length of the ribbon ÷ the length of the badge. The number of badges = 3/4 ÷ 3/8. To solve the division of two fraction we change the division sign by the multiplication sign and reciprocal the fraction after the division sign. The number of the badges = 3/4 × 8/3. The number of the badges = 3*8/4*3=24/12=2. So he can make 2 badges

Can anyone give me the answers pleaseee in a hurry!

Can anyone give me the answers pleaseee in a hurry!

Answers

Look at the image hopefully that helps
Can anyone give me the answers pleaseee in a hurry!

here is da points please help me

here is da points please help me

Answers

Answer:

4

Step-by-step explanation:

2 3-8/4

Answer:

See below.

Step-by-step explanation:

2x-8/y

2(3)-8/4

6-8/4

6-2

4

-hope it helps

please help me im confused.

please help me im confused.

Answers

They said that x=3 so that means 3 to the third power. 3 to the third power is 27x. 27x+ 6x=33x and since 33x and 5 don’t have like terms the equation would be 33x+5

Answer:

50

Step-by-step explanation

substitute the value of the variable into the equation and simplify.

`1\frac{1}{2}`quarts of sparkling water and `\frac{3}{4}`quart of grape juice. a. How much sparkling water would you need to mix with `9` quarts of grape juice? b. How much grape juice would you need to mix with `\frac{15}{4}`quarts of sparkling water? c. How much of each ingredient would you need to make `100` quarts of punch?

Answers

Answer:

Step-by-step explanation:

18 quarts

PLEASE HELP ME WIT DIS

PLEASE HELP ME WIT DIS

Answers

To make things easier, this solid can be divided in 3 parts:

- the first one is 2in long, 5in wide and 8in tall

- the second one is 2in long, 8in wide and 3in tall

- the third one is just like the first one, so 2in long, 5in wide and 8in tall

In order to find the volume of the solids, we need to multiply their dimensions:

1st: 2.5.8 = 80\(in^{3}\)

2nd: 2.8.3 = 48\(in^{3}\\\)

3rd: 2.5.8 = 80\(in^{3}\)

The volume of the big solid is equal to (80 + 48 + 80)\(in^{3}\)

V = 208\(in^{3}\)

Find the surface area of a triangular pyramid with the numbers 10 ft, 11 ft, 12 ft

Find the surface area of a triangular pyramid with the numbers 10 ft, 11 ft, 12 ft

Answers

Don’t really got a good look at your picture but a triangular pyramid with a length of 12 feet, width of 10 feet, and a height of 11 feet would be 390.30.
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