Mathematics High School

y=5x+23, -2x-y=5 i need help with this, it’s solving by substitution. i don’t get it someone pls help

Answers

Answer 1
You just put the y=5x+23 in -2x-y=5
-2x-(5x+23)=5
-2x-5x-23=5
-7x=5+23
-7x=28
X=-4
Answer 2

Answer: if this doesn't help u let me know and i can explain more have a good day <3

x=−4 and y=3

Step-by-step explanation:

Step: Solvey=5x+23for y:

y=5x+23

Step: Substitute5x+23foryin−2x−y=5:

−2x−y=5

−2x−(5x+23)=5

−7x−23=5(Simplify both sides of the equation)

−7x−23+23=5+23(Add 23 to both sides)

−7x=28

−7x/−7=28/−7

(Divide both sides by -7)

x=−4

Step: Substitute−4 for x in y=5x+23:

y=5x+23

y=(5)(−4)+23

y=3(Simplify both sides of the equation)

Answer:

x=−4 and y=3

Related Questions

a quotient that is between 8÷0.001 and 8÷110.

Answers

Answer:

Step-by-step explanation:

I don't actually know if this is what you want but

8 divided by 0.001 is 8000

and

8 divided by 110 is 0.07272727272727272

I hope this helps

Hannah factored the expression 24xy + 15y. Her work is shown below.



1. GCF (24xy, 15y) = 3y

2. 24xy/3 = 8xy, 15y/3 = 5y

3. 3(24xy + 15y)

What are the errors in Hannah’s work? Check all that apply.
She divided by 3 instead of the GCF.
She found the wrong GCF.
She divided wrongly.
She didn’t complete step 4 and use the distributive property to be sure the expressions are equivalent.
She didn’t undistribute the GCF from the original expression.

Answers

Answer:

The correct answers for the multiple choice question are:

Option 1 (or A): She divided by 3 instead of the GCF.

Option 4 (or D): She didn’t complete step 4 and use the distributive property to be sure the expressions are equivalent.

Option 5 (or E): She didn’t undistribute the GCF from the original expression.

Step-by-step explanation:

I got it correct on Edge.

The errors in Hannah’s work are she divided by 3 instead of the GCF and she didn’t undistributed the GCF from the original expression.

The given expression is 24xy+15y.

Here, the factors of 24xy are

24xy = 2×2×2×3×x×y

15y = 3×5×y

So, common factors from both the terms is 3y.

Now, divide and multiply the given expression by 3y.

3y(24xy/3y + 15y/3y)

= 3y(8x+5)

Therefore, the errors in Hannah’s work are she divided by 3 instead of the GCF and she didn’t undistributed the GCF from the original expression.

To learn more about the factorisation of polynomial visit:

https://brainly.com/question/16789195.

#SPJ2

PLEASEEE HELPPP I'LL GIVE BRAINLIEST

Answers

Answer:

x=60°

Step-by-step explanation:

180 - 90 = 90

90 - 30 = 60

x=60

It takes a turtle 3 ¼ hours to walk 1 ½ miles. How many hours does it take to walk one mile?

Answers

Answer: 2.17 hours

Step-by-step explanation:

Answer:

2.17 hours

Step-by-step explanation:

Write the equation for the graph below in point-slope form. Help me

Answers

Answer:

[tex]\frac{5-6}{0-(-3)}[/tex] which simplified would be [tex]\frac{-1}{3}[/tex] or just -0.333

Step-by-step explanation:

22+n=−12
pls help me im kinda confused

Answers

Answer:

-34

Step-by-step explanation:

22+n=-12

n=-12-22

n=-34

When you bring a positive constant to the other side of the equal sign it goes negative and vise versa. Then you combine like terms.

Please follow me!!!! Hope this helps!!! Have a wonderful day :)

James, Priya and slobhan work in a grocery store. James makes $7.00 per hour. Priya makes 20% more than James, and slobhan makes 15% less than Priya. How much does Slobhan make per hour?

he makes $_______ per hour.

is 7.20 correct? ​

Answers

7.20 is the correct answer to the problem.

2x-1-(-x+3) = 6-2x SHOW STEPS....DUE TODAY

Answers

Answer:

x=2

Step-by-step explanation:

Simplify both sides of the equation.

2x−1−(−x + 3)=6−2x

(Distribute the Negative Sign)

2x−1 + −1(−x + 3)=6−2x

2x + −1 + −1(−x) + (−1)(3)=6−2x

2x + −1 + x + −3=6−2x

2x + −1 + x + −3=6 + −2x

(Combine Like Terms)

(2x + x) + (−1 + −3)=−2x+6

3x + −4=−2x + 6

3x−4=−2x + 6

Add 2x to both sides.

3x−4 + 2x=−2x + 6 + 2x

5x−4=6

Add 4 to both sides.

5x−4 + 4=6 + 4

5x=10

Divide both sides by 5.

5x/5=10/5

x=2

Could someone help me with this? It would be greatly appreciated! (Photo Attached)

Answers

Answer:

A

Step-by-step explanation:

move 4x to the other side making it -4x

I will give Brainliest To whoever answers plus 10 points


1+1

Answers

2 ldjfodngksnglsnckd thanks for free points

Can someone help me with this

Answers

Answer:

yes someone can help you. not me

[tex]\frac{n}6=\frac{15}{18} what does n equal?[/tex]

Answers

Answer:

n = 5

Step-by-step explanation:

Given

[tex]\frac{n}{6}[/tex] = [tex]\frac{15}{18}[/tex] ( cross- multiply )

18n = 90 ( divide both sides by 18 )

n = 5

If each 2 cm on the scale drawing equals 10 feet, what are the actual dimensions of the room? (5 points) Length = 11 feet, width = 9 feet Length = 30 feet, width = 20 feet Length = 8 feet, width = 12 feet Length = 22 feet, width = 20 feet

Answers

Answer:

c and i blue

Step-by-step explanation:

Last month Albert earned half of what Betty earned, while Betty earned $5000 more than what Calvin earned. If Donna earned twice what Calvin earned and Albert and Betty together earned $900 more than what Calvin and Donna earned together, how much did each person earn?

Answers

Answer:

Calving earning = 4400

Betty earning = 9400

Albert earning = 4700

Donna = 8800

Step-by-step explanation:

Given that :

Calving earning = c

Betty earning = c + 5000

Albert earning = (c + 5000) /2

Donna = 2c

c + 5000 + (c + 5000) /2 = 900 + c + 2c

c + 5000 + 0.5c + 2500 = 900 + 3c

1.5c + 7500 = 900 + 3c

7500 - 900 = 3c - 1.5c

6600 = 1.5c

c = 6600 / 1.5

c = 4400

Calving earning = c = 4400

Betty earning = 4400 + 5000 = 9400

Albert earning = (4400 + 5000) /2 = 4700

Donna = 2(4400) = 8800

What is the volume of the sphere with the radius of 9 and round to the hundredths​

Answers

Answer:

3046.389 units

Step-by-step explanation:

Given data

r=9units

Volume of sphere

V= 4/3πr^3

substitute

V= 4/3*3.142*9^3

V=1.33*3.142*729

V=3046.388 units

Hence the volume is 3046.389 units

A rectangular piece of plastic is 5 millimeters tall and 10 millimeters wide. What is its area?

Answers

If the shape is a rectangle, the answer is 50 millimeters square [50 millimeters 2]

Which of the following is a decomposition reaction?
reactant plus reactant yields product
reaciant minus reactant yields product
reactant yields product plus product reactant yields product times product

Answers

Answer:

Reactant plus reactant yields product.

Step-by-step explanation:

A decomposition reaction starts from a single substance and produces more than one substance. One substance as a reactant and more than one substance as the products is the key characteristic of a decomposition reaction.

Hope this helps.

What is the value of the following expression if q = 10?
24 divided by (q-2)
HELPPP

Answers

Answer:

(B) 3

Step-by-step explanation:

24/(10-2)

24/8 is 3

What is the value of -34+ (-4+ 7)(2)? 28 3 15​

Answers

Answer:

3/4 * 5/7 = 15/

28

≅ 0.5357143

Answer:

-28

Step-by-step explanation:

Your welcome!

PLEASE HELP ME WITH THIS FOR BRAINLIEST AND A COOKIE

Answers

Answer:

12

Step-by-step explanation:

Answer: the answer is 12

Step-by-step explanation: im just here for the cookie

Round to the nearest tenth.

x=

y=

Answers

Sin 55 = x/21 —> x = 21* sin55 = 17.2
Cos 55 = y/21 —> y= 21 * cos 55=12.0
Can you mark it brainliest?

Zoe buys a new car that is valued at $24,000. The car will depreciate at
a rate of 1% per month. What is the value of the car after 6 months?

Answers

Answer:

120

Step-by-step explanation:

Principal = 24,000

Rate = 1%

Time = 6 months = 0.5

Simple Interest = 24000×1×0.5 ÷ 100

= 120

Find all solutions to (x+5)(2x-3). Explain or show your reasoning.

Answers

first you do x multiply 2x to get 2x^2
then you do x multiply-3 to get -3x
then 5 multiply 2x so you get 10x
then you do 5 multiply-3 to get -15

then you join it together to get
2x^2+10x-3x-15
then simply to get 2x^2+7x-15
and that should be your answer

A circle has a diameter of 28 mm. What is its circumference?

Use 3.14 for 1, and do not round your answer. Be sure to include the correct unit in your answer.

Answers

Answer: C=87.92 mm

Explanation: We can find the circumference using C=πd.

When using 3.14 for π, we will simply have C=3.14*28, which equals 87.92mm.

7. The figure shows a right rectangular prism whose base is a square...

Answers

Answer:

D

Step-by-step explanation:

hELP I WILL GIVE BRAINLIEST TO THE CORRECT ANSWER

Answers

Answer:

It’s the number 2

Step-by-step

Select all the pairs of like terms in the expression.
2/5y + 1/5x – 0.2y – 6 + (–2)
2/5y and 1/5x
2/5y and –0.2y
1/5x and –0.2y
–0.2y and 2
–6 and –2
PLEASE I NEED HELP.... THIS QUESTION IS FOR 25 POINTS SO PLEASE HELP

Answers

Answer:

2/5y and -0.2y, -6 and -2

Step-by-step explanation:

Here, in 2/5y and -0.2y both are having there like terms that is y in there variables.

Also, in -6 and -2 both are having nothing in there variables.

2/5y and -0.2y, -6 and -2

Philip is having a party and wants to spend less than $408. He has already spent $300. The only item left on his list is sodas, which
cost $12 per case. How many cases of soda, x, can Philip purchase and stay under his budget?
Select the number line that includes the largest number of cases of soda that Philip can purchase and still stay under his budget.
ОА

Answers

Answer:

exactly 9 cases of soda

Step-by-step explanation:

408 - 300 = 108

12 x 9 = 108

so he would spend exactly 408$

I hope I helped!!!

What is x/2 - 14 = 20​

Answers

Answer:

x=68

Step-by-step explanation:

Answer:

x =68

Step-by-step explanation:

x + y = 4
2x - 5y = 15
Graphing

Answers

Answer:

Step-by-step explanation:

5x + 5y = 20

2x - 5y = 15

7x = 35

x = 5

5 + y = 4

y = -1

(5, -1)

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